Exhibit 99.1

NEWS RELEASE

FOR IMMEDIATE RELEASE

Contact:		William P. Hornby, CPA
		whornby@centurybank.com
Phone:		781-393-4630
Fax:		781-393-4071

CENTURY BANCORP, INC. ANNOUNCES RECORD EARNINGS, UP 24%, FOR FIRST SIX
MONTHS OF 2011; 6% ASSET GROWTH TO $2.6BB; REGULAR DIVIDEND DECLARED

Medford, MA, July 12, 2011 — Century Bancorp, Inc. (NASDAQ:CNBKA) (www.centurybank.com) (“the Company”) today announced record net income of $7,922,000 for the first six months ended June 30, 2011, or $1.43 per share diluted, an increase of 24.1% compared to net income of $6,383,000, or $1.15 per share diluted, for the same period a year ago. Total assets increased 6.4% from $2.4 billion at December 31, 2010 to $2.6 billion at June 30, 2011. For the quarter ended June 30, 2011, net income totaled $4,197,000, or $0.76 per share diluted, an increase of 41.7% compared to net income of $2,961,000, or $0.54 per share diluted, for the second quarter of 2010.

Net interest income totaled $27.4 million for the first six months of 2011 compared to $25.9 million for the same period in 2010. The 6.1% increase in net interest income for the period is due to a 10.1% increase in the average balances of earning assets, combined with a similar increase in average deposits, offset slightly by a decrease in the net interest margin from 2.57% on a fully taxable equivalent basis in 2010 to 2.53% on the same basis for 2011.

The provision for loan losses decreased by $625,000 from $3.0 million for the six months ended June 30, 2010 to $2.4 million, for the six months ended June 30, 2011, primarily as a result of decreased provisions related to nonaccrual loans. The Company’s effective tax rate declined from 9.4% in 2010 to 6.1% in 2011 primarily as a result of an increase in tax-exempt income.

At June 30, 2011, total equity was $155.3 million compared to $145.0 million at December 31, 2010. The Company’s equity increased primarily as a result of earnings and a decrease in accumulated other comprehensive loss, net of taxes, offset somewhat by dividends paid. The Company’s leverage ratio stood at 7.00% at June 30, 2011, compared to 7.23% at June 30, 2010. This decline in the leverage ratio is due to an increase in assets, offset by an increase in stockholders’ equity. Book value as of June 30, 2011 was $28.04 per share compared to $25.86 at June 30, 2010.

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Included in operating expenses for the second quarter of 2010 is a charge for payments due a former Co-CEO, in accordance with his separation agreement as previously announced. The Company recorded a pre-tax charge of $916,000.

The Company’s allowance for loan losses was $15.9 million or 1.65% of loans outstanding at June 30, 2011, compared to $14.1 million, or 1.55% of loans outstanding at December 31, 2010 and $14.4 million, or 1.65% of loans outstanding at June 30, 2010. Non-performing assets totaled $12.3 million at June 30, 2011, compared to $8.1 million at December 31, 2010 and $10.8 million at June 30, 2010.

The Company’s Board of Directors voted a regular quarterly dividend of 12.00 cents ($0.12) per share on the Company’s Class A common stock, and 6.00 cents ($0.06) per share on the Company’s Class B common stock. The dividends were declared payable August 15, 2011 to stockholders of record on August 1, 2011.

The Company, through its subsidiary bank, Century Bank and Trust Company, a state chartered full service commercial bank, operating twenty-four full-service branches in the Greater Boston area, including our newest branch in Newton Centre, offers a full range of Business, Personal and Institutional Services.

Century Bank and Trust Company is a member of the FDIC and is an Equal Housing Lender.

This press release contains certain “forward-looking statements” with respect to the financial condition, results of operations and business of the Company. Actual results may differ from those contemplated by these statements. The Company wishes to caution readers not to place undue reliance on any forward-looking statements. The Company disclaims any intent or obligation to update publicly any such forward-looking statements, whether in response to new information, future events or otherwise.

Century Bancorp, Inc. and Subsidiaries
Consolidated Comparative Statements of Condition (unaudited)
(in thousands)

		June 30,				December 31,
		2011				2010
Assets
Cash and Due From Banks		$	40,523			$	37,215
Federal Funds Sold and Interest-bearing Deposits In Other Banks			126,808				151,337
Short-term Investments			94,091				113,918
Securities Available-For-Sale (AFS)			1,077,478				909,391
Securities Held-to-Maturity			196,392				230,116
Federal Home Loan Bank of Boston stock, at cost			15,531				15,531
Loans:
Commercial & Industrial			88,619				90,654
Construction & Land Development			55,572				53,583
Commercial Real Estate			470,041				433,337
Residential Real Estate			232,235				207,787
Consumer and Other			6,560				6,594
Home Equity			110,001				114,209
Total Loans			963,028				906,164
Less: Allowance for Loan Losses			15,915				14,053
Net Loans			947,113				892,111
Bank Premises and Equipment			21,723				21,228
Accrued Interest Receivable			7,054				6,601
Goodwill			2,714				2,714
Core Deposit Intangible			314				508
Other Assets			68,188				61,014
Total Assets		$	2,597,929			$	2,441,684
Liabilities
Demand Deposits		$	323,868			$	322,002
Interest Bearing Deposits:
Savings and NOW Deposits			654,670				649,402
Money Market Accounts			570,338				513,359
Time Deposits			507,330				417,260
Total Interest Bearing			1,732,338				1,580,021
Total Deposits			2,056,206				1,902,023
Borrowed Funds:
Securities Sold Under Agreements to Repurchase			108,930				108,550
Other Borrowed Funds			213,143				222,118
Total Borrowed Funds			322,073				330,668
Other Liabilities			28,225				27,885
Subordinated Debentures			36,083				36,083
Total Liabilities			2,442,587				2,296,659
Total Stockholders’ Equity			155,342				145,025
Total Liabilities & Stockholders’ Equity		$	2,597,929			$	2,441,684

Century Bancorp, Inc. and Subsidiaries
Consolidated Comparative Statements of Income (unaudited)
For the Quarter and Six months ended June 30, 2011 and 2010
(in thousands)

		Quarter Ended June 30,								Six months ended June 30,
		2011				2010				2011				2010
Interest Income:
Loans		$	12,012			$	12,068			$	24,117			$	24,180
Securities Held-to-Maturity			1,518				1,875				3,291				3,860
Securities Available-for-Sale			5,709				4,979				11,062				10,012
Federal Funds Sold and Interest-bearing Deposits In Other Banks			358				403				705				781
Total Interest Income			19,597				19,325				39,175				38,833
Interest Expense:
Savings and NOW Deposits			719				1,093				1,431				2,314
Money Market Accounts			777				1,089				1,482				2,313
Time Deposits			2,494				1,876				4,773				3,584
Securities Sold Under Agreements to Repurchase			98				131				208				350
Other Borrowed Funds and Subordinated Debentures			1,994				1,994				3,839				4,405
Total Interest Expense			6,082				6,183				11,733				12,966
Net Interest Income			13,515				13,142				27,442				25,867
Provision For Loan Losses			1,200				1,450				2,400				3,025
Net Interest Income After
Provision for Loan Losses			12,315				11,692				25,042				22,842
Other Operating Income
Service Charges on Deposit Accounts			1,936				1,952				3,823				3,875
Lockbox Fees			734				748				1,471				1,448
Net Gain on Sales of Investments			198				649				362				1,027
Other Income			973				756				1,720				2,014
Total Other Operating Income			3,841				4,105				7,376				8,364
Operating Expenses
Salaries and Employee Benefits			7,250				7,850				14,591				14,775
Occupancy			975				998				2,226				2,066
Equipment			534				533				1,092				1,083
FDIC Assessment			464				740				1,199				1,390
Other			2,552				2,477				4,877				4,850
Total Operating Expenses			11,775				12,598				23,985				24,164
Income Before Income Taxes			4,381				3,199				8,433				7,042
Income Tax Expense			184				238				511				659
Net Income		$	4,197			$	2,961			$	7,922			$	6,383

Century Bancorp, Inc. and Subsidiaries
Consolidated Year-to-Date Average Comparative Statements of Condition (unaudited)
(in thousands)

		June 30,				June 30,
		2011				2010
Assets
Cash and Due From Banks		$	51,938			$	51,926
Federal Funds Sold and Interest-Bearing Deposits in Other Banks			306,157				376,595
Securities Available-For-Sale (AFS)			990,345				741,425
Securities Held-to-Maturity			205,996				224,320
Total Loans			940,076				876,900
Less: Allowance for Loan Losses			15,017				13,354
Net Loans			925,059				863,546
Unrealized Gain on Securities AFS			7,286				11,900
Bank Premises and Equipment			21,238				21,316
Accrued Interest Receivable			6,822				6,607
Goodwill			2,714				2,714
Core Deposit Intangible			416				803
Other Assets			63,139				58,191
Total Assets		$	2,581,110			$	2,359,343
Liabilities
Demand Deposits		$	310,522			$	283,737
Interest Bearing Deposits:
Savings and NOW Deposits			721,931				669,164
Money Market Accounts			570,448				552,640
Time Deposits			473,464				330,530
Total Interest Bearing			1,765,843				1,552,334
Total Deposits			2,076,365				1,836,071
Borrowed Funds:
Securities Sold Under Agreements to Repurchase			123,582				146,515
Other Borrowed Funds			166,699				171,175
Total Borrowed Funds			290,281				317,690
Other Liabilities			28,801				30,605
Subordinated Debentures			36,083				36,083
Total Liabilities			2,431,530				2,220,449
Total Stockholders’ Equity			149,580				138,894
Total Liabilities & Stockholders’ Equity		$	2,581,110			$	2,359,343
Total Average Earning Assets — QTD		$	2,505,504			$	2,237,469
Total Average Earning Assets — YTD		$	2,442,574			$	2,219,240

Century Bancorp, Inc. and Subsidiaries
Consolidated Selected Key Financial Information (unaudited)
(in thousands, except share data)

		June 30,				June 30,
		2011				2010
Performance Measures:
Earnings per average share, basic, quarter		$	0.76			$	0.54
Earnings per average share, diluted, quarter		$	0.76			$	0.54
Earnings per average share, basic, year-to-date		$	1.43			$	1.15
Earnings per average share, diluted, year-to-date		$	1.43			$	1.15
Return on average assets, year-to-date			0.62	%			0.55	%
Return on average stockholders’ equity, year-to-date			10.68	%			9.27	%
Net interest margin (taxable equivalent), quarter			2.43	%			2.58	%
Net interest margin (taxable equivalent), year-to-date			2.53	%			2.57	%
Efficiency ratio, year-to-date			63.0	%			66.0	%
Book value per share		$	28.04			$	25.86
Tangible book value per share		$	27.49			$	25.25
Tangible capital / tangible assets			5.87	%			5.78	%
Common Share Data:
Average shares outstanding, basic, quarter			5,540,597				5,530,297
Average shares outstanding, diluted, quarter			5,541,595				5,532,980
Average shares outstanding, basic, year-to-date			5,540,590				5,530,297
Average shares outstanding, diluted, year-to-date			5,541,743				5,533,025
Shares outstanding Class A			3,543,717				3,518,917
Shares outstanding Class B			1,996,880				2,011,380
Total shares outstanding at period end			5,540,597				5,530,297
Asset Quality and Other Data:
Allowance for loan losses / loans			1.65	%			1.65	%
Nonaccrual loans		$	12,314			$	10,679
Nonperforming assets		$	12,314			$	10,758
Loans 90 days past due and still accruing		$	546			$	7
Accruing troubled debt restructures		$	3,921			$	1,220
Net charge-offs, year-to-date		$	538			$	1,048
Leverage ratio			7.00	%			7.23	%
Tier 1 risk weighted capital ratio			14.54	%			14.47	%
Total risk weighted capital ratio			15.79	%			15.68	%
Total risk weighted assets		$	1,269,913			$	1,182,496