Exhibit 99.1

PRESS RELEASE		Contact: Richard P. Smith
For Immediate Release		President & CEO (530) 898-0300

TRICO BANCSHARES ANNOUNCES QUARTERLY RESULTS

CHICO, Calif. – (July 26, 2011) – TriCo Bancshares (NASDAQ: TCBK) (the “Company”), parent company of Tri Counties Bank (the “Bank”), today announced quarterly earnings of $2,771,000 for the quarter ended June 30, 2011. These earnings represent a $1,451,000 (110%) increase when compared to earnings of $1,320,000 reported for the quarter ended June 30, 2010. Diluted earnings per share for the quarter ended June 30, 2011 was $0.17 compared to diluted earnings per share of $0.08 for the quarter ended June 30, 2010. Diluted earnings per share for the six months ended June 30, 2011 and 2010 were $0.35 and $0.18, respectively, on earnings of $5,571,000 and $2,878,000, respectively.

Total assets of the Company decreased $48,461,000 (2.2%) to $2,176,184,000 at June 30, 2011 from $2,224,645,000 at June 30, 2010. Total loans of the Company decreased $104,878,000 (7.0%) to $1,396,062,000 at June 30, 2011 from $1,500,940,000 at June 30, 2010. During the three months ended June 30, 2011, loans increased $8,402,000, or 2.4% on an annualized basis. Excluding the Granite acquisition during the quarter ended June 30, 2010, this most recent quarterly increase in loans represents the first quarterly increase in loans since the quarter ended December 31, 2008. Total deposits of the Company decreased $53,218,000 (2.8%) to $1,836,731,000 at June 30, 2011 from $1,889,949,000 at June 30, 2010. Excluding a $70,000,000 decrease in certificates of deposit issued to the State of California that occurred during the fourth quarter of 2010, total deposits would have increased $16,782,000 during the twelve months ended June 30, 2011. The following is a summary of the components of net income for the periods indicated:

		Three months ended
		June 30,
(in thousands)		2011				2010				$ Change				% Change
Net Interest Income		$	21,753			$	22,134			$	(381	)			(1.7	%)
Provision for loan losses			(5,561	)			(10,000	)			4,439				(44.4	%)
Noninterest income			8,251				8,104				147				1.8	%
Noninterest expense			(20,095	)			(18,408	)			(1,687	)			9.2	%
Provision for income taxes			(1,577	)			(510	)			(1,067	)			209.2	%
Net income		$	2,771			$	1,320			$	1,451				109.9	%

Net interest income during the three months ended June 30, 2011 decreased $381,000 (1.7%) from the same period in 2010 to $21,753,000. The decrease in net interest income was due to a 0.10% (ten basis points) decrease in net interest margin on a fully tax-equivalent basis to 4.31% and a $69,486,000 (4.7%) decrease in average balance of loans. Much of the ten basis point decrease in net interest margin was due to the fact that despite historically low deposit rates, the ability to deploy deposits into some interest-earning asset other than short-term low-yield interest-earning cash at the Federal Reserve Bank has been limited. This limitation is the result of weak loan demand and investment yields that have been unattractive given their interest rate risk profile.

The following table details the components of the net interest income and net interest margin on a fully tax-equivalent (FTE) basis for the periods indicated:

		Three months ended												Three months ended
		June 30, 2011												June 30, 2010
		Average				Income/				Yield/				Average				Income/				Yield/
		Balance				Expense				Rate				Balance				Expense				Rate
Assets:
Loans		$	1,393,989			$	21,735				6.24	%		$	1,463,475			$	22,701				6.20	%
Investment securities — taxable			271,089				2,354				3.47	%			278,799				2,733				3.92	%
Investment securities — nontaxable			11,839				216				7.31	%			15,502				299				7.71	%
Cash at Federal Reserve and other banks			351,512				242				0.28	%			261,910				154				0.24	%
Total earning assets			2,028,429				24,547				4.84	%			2,019,686				25,887				5.13	%
Other assets			164,222												171,974
Total		$	2,192,651											$	2,191,660
Liabilities and shareholders’ equity:
Interest-bearing demand deposits			408,109				358				0.35	%			386,788				586				0.61	%
Savings deposits			613,924				372				0.24	%			541,710				613				0.45	%
Time deposits			406,436				1,072				1.06	%			544,320				1,528				1.12	%
Other borrowings			59,139				600				4.06	%			61,629				602				3.91	%
Junior subordinated debt			41,238				312				3.03	%			41,238				313				3.04	%
Total interest-bearing liabilities			1,528,846				2,714				0.71	%			1,575,685				3,642				0.92	%
Noninterest-bearing deposits			424,331												376,300
Other liabilities			33,711												36,147
Shareholders’ equity			205,763												203,528
Total liabilities and shareholders’ equity		$	2,192,651											$	2,191,660
Net interest rate spread(1)											4.13	%											4.21	%
Net interest income and interest margin(2)						$	21,833				4.31	%						$	22,245				4.41	%

The Company provided $5,561,000 for loan losses during the three months ended June 30, 2011 versus $10,000,000 during the three months ended June 30, 2010. The allowance for loan losses increased $738,000 from $43,224,000 at March 31, 2011 to $43,962,000 at June 30, 2011. The provision for loan losses and increase in the allowance for loan and lease losses during the three months ended June 30, 2011 were primarily the result of changes in the make-up of the loan portfolio and the Bank’s loss factors in reaction to losses in the construction, commercial real estate, commercial & industrial (C&I), home equity and auto indirect loan portfolios.

Noninterest income increased $147,000 (1.8%) to $8,251,000 during the three months ended June 30, 2011 when compared to the three months ended June 30, 2010. The following table presents the key components of noninterest income for the periods indicated:

		Three months ended
		June 30,
(in thousands)		2011				2010				$ Change				% Change
Service charges on deposit accounts		$	3,700			$	4,443			$	(743	)			(16.7	%)
ATM fees and interchange			1,776				1,531				245				16.0	%
Other service fees			437				362				75				20.7	%
Mortgage banking service fees			370				315				55				17.5	%
Change in value of mortgage servicing rights			(162	)			(569	)			407				(71.5	%)
Total service charges and fees			6,121				6,082				39				0.6	%
Gain on sale of loans			495				577				(82	)			(14.2	%)
Commission on NDIP			648				362				286				79.0	%
Increase in cash value of life insurance			450				426				24				5.6	%
Change in indemnification asset			144				—				144
Gain (loss) on sale of foreclosed assets			185				310				(125	)			(40.3	%)
Bargain purchase gain			—				232				(232	)			(100.0	%)
Sale of customer checks			67				54				13				24.1	%
Lease brokerage income			95				21				74				352.4	%
Gain (loss) on disposal of fixed assets			(6	)			(15	)			9				(60.0	%)
Commission rebates			(16	)			(17	)			1				(5.9	%)
Other nonintrest income			68				72				(4	)			(5.6	%)
Total other noninterest income			2,130				2,022				108				5.3	%
Total noninterest income		$	8,251			$	8,104			$	147				1.8	%

Service charges on deposit accounts were down $743,000 (16.7%) due to new overdraft regulations that became effective on July 1, 2010 and caused a decrease in non-sufficient funds fees. ATM fees and interchange income was up $245,000 (16.0%) due to increased customer point-of-sale transactions that are the result of incentives for such usage. Overall, mortgage banking activities, which includes mortgage banking servicing fees, change in value of mortgage servicing rights, and gain on sale of loans, accounted for $703,000 of noninterest income during the three months ended June 30, 2011 compared to $323,000 during the three months ended June 30, 2010. Commissions on sale of nondeposit investment products increased $286,000 (79.0%) during the three months ended June 30, 2011. The change in indemnification asset of $144,000 recorded during the three months ended June 30, 2011 is primarily due to an increase in estimated loan losses from the loan portfolio and foreclosed assets acquired in the Granite acquisition on May 28, 2010, and the fact that such losses are generally “covered” at the rate of 80% by the FDIC. The actual increase in estimated losses is reflected in decreased interest income, increased provision for loan losses and/or increased provision for foreclosed asset losses. The Company recorded a bargain purchase gain of $232,000 related to the Granite acquisition during the three months ended June 30, 2010.

Noninterest expense for the three months ended June 30, 2011 was $20,095,000, an increase of $1,687,000 (9.2%), as compared to the same period in 2010. The following table presents the key components of noninterest expense for the periods indicated:

		Three months ended
		June 30,
(in thousands)		2011				2010				$ Change				% Change
Salaries		$	7,198			$	6,990			$	208				3.0	%
Commissions and incentives			783				526				257				48.9	%
Employee benefits			2,734				2,469				265				10.7	%
Total salaries and benefits expense			10,715				9,985				730				7.3	%
Occupancy			1,402				1,407				(5	)			(0.4	%)
Equipment			880				1,060				(180	)			(17.0	%)
Change in reserve for unfunded commitments			(50	)			(800	)			750				(93.8	%)
Data processing and software			956				661				295				44.6	%
Telecommunications			520				461				59				12.8	%
ATM network charges			507				446				61				13.7	%
Professional fees			573				704				(131	)			(18.6	%)
Advertising and marketing			739				627				112				17.9	%
Postage			219				311				(92	)			(29.6	%)
Courier service			221				201				20				10.0	%
Intangible amortization			20				72				(52	)			(72.2	%)
Operational losses			118				120				(2	)			(1.7	%)
Provision for foreclosed asset losses			638				55				583				1060.0	%
Foreclosed asset expense			115				66				49				74.2	%
Assessments			518				812				(294	)			(36.2	%)
Other			2,004				2,220				(216	)			(9.7	%)
Total other noninterest expense			9,380				8,423				957				11.4	%
Total noninterest expense		$	20,095			$	18,408			$	1,687				9.2	%

Salary and benefit expenses increased $730,000 (7.3%) to $10,715,000 during the three months ended June 30, 2011 compared to the three months ended June 30, 2010. Base salaries increased $208,000 (3.0%) to $7,198,000 during the three months ended June, 2011. The increase in base salaries was mainly due to a 2.6% increase in average full time equivalent staff to 672. Incentive and commission related salary expenses increased $257,000 (48.9%) to $783,000 during three months ended June 30, 2011 due primarily to increases in production related incentives and incentives tied to net income. Benefits expense, including retirement, medical and workers’ compensation insurance, and taxes, increased $265,000 (10.7%) to $2,734,000 during the three months ended June 30, 2011 primarily due to increases in stock option vesting, supplemental retirement plan expenses, and employer taxes related to option exercises.

Other noninterest expenses increased $957,000 (11.4%) to $9,380,000 during the three months ended June 30, 2011 when compared to the three months ended June 30, 2010. Changes in the various categories of other noninterest expense are reflected in the table above. The changes are indicative of the economic environment which has led to increases, or fluctuations, in professional loan collection expenses, provision for foreclosed asset losses, and foreclosed asset expenses.

The effective tax rate on income was 36.3% and 27.9% for the three months ended June 30, 2011 and 2010, respectively. The effective tax rate was greater than the federal statutory tax rate due to state tax expense of $384,000 and $108,000, respectively, in these periods. Tax-exempt income of $136,000 and $188,000, respectively, from investment securities, and $450,000 and $426,000, respectively, from increase in cash value of life insurance in these periods, along with relatively low levels of net income before taxes, helped to reduce the effective tax rate.

In addition to the historical information contained herein, this press release may contain certain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The reader of this press release should understand that all such forward-looking statements are subject to various uncertainties and risks that could affect their outcome. The Company’s actual results could differ materially from those suggested by such forward-looking statements. Factors that could cause or contribute to such differences include, but are not limited to, variances in the actual versus projected growth in assets, return on assets, interest rate fluctuations, economic conditions in the Company’s primary market area, demand for loans, regulatory and accounting changes, loan losses, expenses, rates charged on loans and earned on securities investments, rates paid on deposits, competition effects, fee and other noninterest income earned as well as other factors detailed in the Company’s reports filed with the Securities and Exchange Commission which are incorporated herein by reference, including the Form 10-K for the year ended December 31, 2010. These reports and this entire press release should be read to put such forward-looking statements in context and to gain a more complete understanding of the uncertainties and risks involved in the Company’s business. Any forward-looking statement may turn out to be wrong and cannot be guaranteed. The Company does not intend to update any of the forward-looking statements after the date of this release.

TriCo Bancshares and Tri Counties Bank are headquartered in Chico, California. Tri Counties Bank has a 36-year history in the banking industry. It operates 34 traditional branch locations and 27 in-store branch locations in 23 California counties. Tri Counties Bank offers financial services and provides a diversified line of products and services to consumers and businesses, which include demand, savings and time deposits, consumer finance, online banking, mortgage lending, and commercial banking throughout its market area. It operates a network of 69 ATMs and a 24-hour, seven days-a-week telephone customer service center. Brokerage services are provided by the Bank’s investment services affiliate, Raymond James Financial Services, Inc. For further information please visit the Tri Counties Bank web site at http://www.tricountiesbank.com.

TRICO BANCSHARES — CONSOLIDATED FINANCIAL DATA
(Unaudited. Dollars in thousands, except share data)

		Three months ended
		June 30,				March 31,				December 31,				September 30,				June 30,
		2011				2011				2010				2010				2010
Statement of Income Data
Interest income		$	24,467			$	24,434			$	25,627			$	27,233			$	25,776
Interest expense			2,714				2,730				3,036				3,497				3,642
Net interest income		$	21,753			$	21,704				22,591				23,736				22,134
Provision for loan losses			5,561				7,001				8,144				10,814				10,000
Noninterest income:
Service charges and fees			6,121				5,782				6,045				5,237				6,082
Other income			2,130				3,568				3,836				1,926				2,022
Total noninterest income			8,251				9,350				9,881				7,163				8,104
Noninterest expense:
Base salaries net of deferred loan origination costs		$	7,198			$	7,004				7,160				7,131				6,990
Incentive compensation expense			783				916				478				294				526
Employee benefits and other compensation expense			2,734				2,873				2,434				2,473				2,469
Total salaries and benefits expense		$	10,715			$	10,793				10,072				9,898				9,985
Other noninterest expense			9,380				8,878				9,398				10,626				8,423
Total noninterest expense		$	20,095				19,671				19,470				20,524				18,408
Income (loss) before taxes		$	4,348			$	4,382				4,858				(439	)			1,830
Net income		$	2,771			$	2,800			$	3,126			$	1			$	1,320
Share Data
Basic earnings per share		$	0.17			$	0.18			$	0.20			$	0.00			$	0.08
Diluted earnings per share		$	0.17			$	0.17			$	0.20			$	0.00			$	0.08
Book value per common share		$	12.82			$	12.72			$	12.64			$	12.66			$	12.76
Tangible book value per common share		$	11.82			$	11.71			$	11.62			$	11.64			$	11.74
Shares outstanding			15,978,958				15,860,138				15,860,138				15,860,138				15,860,138
Weighted average shares			15,922,228				15,860,138				15,860,138				15,860,138				15,860,138
Weighted average diluted shares			15,953,572				16,023,589				16,009,538				15,972,826				16,107,909
Credit Quality
Nonperforming loans		$	73,720			$	71,053			$	75,987			$	84,983			$	72,708
Guaranteed portion of nonperforming loans(2)			3,496				3,736				3,937				4,131				4,674
Foreclosed assets, net of allowance			9,337				8,983				9,913				11,172				9,945
Loans charged-off			5,230				7,049				6,040				11,163				8,424
Loans recovered			407				701				1,698				689				513
Allowance for losses to total loans(1)			3.34	%			3.31	%			3.18	%			2.86	%			2.75	%
Allowance for losses to NPLs(1)			63	%			65	%			59	%			49	%			57	%
Allowance for losses to NPAs(1)			56	%			57	%			53	%			43	%			50	%
Selected Financial Ratios
Return on average total assets			0.51	%			0.51	%			0.56	%			0.00	%			0.24	%
Return on average equity			5.39	%			5.50	%			6.14	%			0.00	%			2.61	%
Average yield on loans			6.24	%			6.22	%			6.39	%			6.61	%			6.20	%
Average yield on interest-earning assets			4.84	%			4.84	%			4.88	%			5.31	%			5.13	%
Average rate on interest-bearing liabilities			0.71	%			0.72	%			0.76	%			0.87	%			0.92	%
Net interest margin (fully tax-equivalent)			4.31	%			4.31	%			4.30	%			4.63	%			4.41	%

TRICO BANCSHARES — CONSOLIDATED FINANCIAL DATA
(Unaudited. Dollars in thousands)

		Three months ended
		June 30,				March 31,				December 31,				September 30,				June 30,
		2011				2011				2010				2010				2010
Balance Sheet Data
Cash and due from banks		$	391,054			$	406,294			$	371,066			$	398,191			$	322,644
Securities, available-for-sale			264,992				279,824				277,271				250,012				275,783
Federal Home Loan Bank Stock			9,199				9,133				9,133				9,157				9,523
Loans held for sale			4,379				2,834				4,988				9,455				4,153
Loans:
Commercial loans			140,531				131,242				141,902				149,743				162,898
Consumer loans			382,864				388,142				423,238				436,597				434,943
Real estate mortgage loans			828,757				823,563				807,482				821,562				860,615
Real estate construction loans			43,910				44,713				46,949				44,890				42,484
Total loans, gross			1,396,062				1,387,660				1,419,571				1,452,792				1,500,940
Allowance for loan losses			(43,962	)			(43,224	)			(42,571	)			(38,770	)			(38,430	)
Foreclosed assets			9,337				8,983				9,913				11,172				9,945
Premises and equipment			20,142				18,552				19,120				18,947				19,001
Cash value of life insurance			51,441				50,991				50,541				49,972				49,546
Goodwill			15,519				15,519				15,519				15,519				15,519
Intangible assets			475				495				580				665				750
Mortgage servicing rights			4,818				4,808				4,605				3,905				4,033
FDIC indemnification asset			4,545				6,689				5,640				5,098				7,515
Accrued interest receivable			6,549				6,941				7,131				7,318				7,472
Other assets			41,634				40,239				37,282				36,185				36,251
Total assets			2,176,184				2,195,738				2,189,789				2,229,618				2,224,645
Deposits:
Noninterest-bearing demand deposits			419,391				427,116				424,070				389,315				386,617
Interest-bearing demand deposits			401,040				406,060				395,413				383,859				383,578
Savings deposits			618,413				608,582				585,845				577,603				552,616
Time certificates			397,887				418,154				446,845				537,764				567,138
Total deposits			1,836,731				1,859,912				1,852,173				1,888,541				1,889,949
Accrued interest payable			1,865				2,044				2,151				2,368				2,487
Reserve for unfunded commitments			2,640				2,690				2,640				2,840				2,840
Other liabilities			29,561				30,262				29,170				26,721				25,257
Other borrowings			59,234				57,781				62,020				67,182				60,452
Junior subordinated debt			41,238				41,238				41,238				41,238				41,238
Total liabilities			1,971,269				1,993,927				1,989,392				2,028,890				2,022,223
Total shareholders’ equity			204,915				201,811				200,397				200,728				202,422
Accumulated other comprehensive gain (loss)			2,644				1,086				1,310				3,606				4,132
Average loans			1,393,989				1,396,331				1,443,603				1,481,497				1,463,473
Average interest-earning assets			2,028,429				2,024,285				2,107,499				2,060,108				2,019,684
Average total assets			2,192,651				2,189,363				2,235,471				2,237,670				2,191,660
Average deposits			1,852,800				1,851,606				1,895,006				1,893,677				1,849,118
Average total equity		$	205,763			$	203,535			$	203,712			$	205,324			$	203,528
Total risk based capital ratio			14.6	%			14.5	%			14.2	%			13.8	%			13.6	%
Tier 1 capital ratio			13.3	%			13.2	%			12.9	%			12.6	%			12.3	%
Tier 1 leverage ratio			10.4	%			10.3	%			10.0	%			9.9	%			10.2	%
Tangible capital ratio			8.7	%			8.5	%			8.5	%			8.3	%			8.4	%