Exhibit 99.1

FOR IMMEDIATE RELEASE

SIERRA BANCORP REPORTS FIRST QUARTER EARNINGS

Porterville, CA – April 25, 2011 – Sierra Bancorp (Nasdaq: BSRR), parent of Bank of the Sierra, today announced its financial results for the quarter ended March 31, 2011.  Sierra Bancorp recognized net income of $1.5 million and diluted earnings per share of $0.11 for the quarter, while our annualized return on average equity was 3.86% and return on average assets was 0.48%.  The financial results for the first quarter of 2011 are similar to the fourth quarter of 2010, but represent a decline relative to the $2.3 million in net income and $0.20 earnings per share in the first quarter of 2010.  The decline relative to the prior year is primarily the result of a drop in net interest income and a lower level of non-interest income, partially offset by expense reductions.

Notable balance sheet changes in the first quarter of 2011 include the following:  Loan balances declined by $29 million, or 4%; investments and fed funds sold increased by $43 million, or 13%; cash and due from banks increased by $15 million, or 36%; core non-maturity deposits grew $21 million, or 3%; we added $15 million in longer-term wholesale-sourced brokered deposits; and non-deposit borrowings dropped by $15 million, or 49%.  Furthermore, we experienced a net increase of $6 million, or 9%, in nonperforming assets.  Our allowance for loan and lease losses was 2.76% of total loans at March 31, 2011, up from 2.62% at the end of 2010.

“A highlight of the first quarter of 2011 was a very successful branch opening in the city of Selma,” commented James C. Holly, President and CEO.  “Another positive development was our success in controlling overhead expenses, although credit-related expenses remain at elevated levels,” he noted further.  “Internal simulations indicate that we still have a strong level of core earnings if we assume pre-recession levels for credit expenses, including our loan loss provision, and we continue to work diligently to reduce nonperforming assets in a rational manner in order to get expenses back to normal levels,” Holly explained.  “Also of critical importance to future income growth is enhancing our ability to generate loan volume, in light of current weak demand in our markets,” he added.  “We’ve made selective personnel changes over the past year or so in an effort to increase lending activity in our branches, and we’ve been reviewing a larger number of potential deals in the past few months.  However, it will likely take a few more months for potential loans in the ‘pipeline’ to be approved and funded and help stem the downward trend in loan balances,” he concluded.

Financial Highlights

Net interest income declined by $1.3 million, or 9%, for the first quarter of 2011 relative to the first quarter of 2010.  The drop is the result of a decline in average interest-earning assets of $38 million, or 3%, and a 29 basis point drop in our net interest margin.  Negative factors impacting our net interest margin in 2011 include lower real estate loan yields resulting from increased competition for quality loans, a shift from average loan balances into lower-yielding investment balances, and higher average balances for non-interest earning cash and due from banks and other non-earning assets (primarily our net deferred tax asset).  Net interest reversals totaled only $27,000 in the first quarter of 2011 relative to $285,000 in the first quarter of 2010, partially offsetting the negative factors for the quarterly comparison.  Also having a favorable impact on our net interest margin were a shift in average balances from non-deposit borrowings, brokered CD’s, and jumbo time deposits into lower-cost core deposits, and a reduced reliance on interest-bearing liabilities resulting from increases in the average balances of non-interest bearing demand deposits and equity.  Our net interest margin could continue to experience slight contraction due to heightened competitive pressures on loan yields, and that effect will be exacerbated if we are unable to reverse the negative trend in loan balances.

Sierra Bancorp Financial Results

April 25, 2011

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The Company’s loan loss provision increased by $200,000, or 6%, in the first quarter of 2011 relative to the first quarter of 2010.  Thus far in 2011, our loan loss provision has been utilized to provide specific reserves for impaired loans and to replenish reserves subsequent to loan charge-offs.  Net loans charged off totaled $3.2 million in the first quarter of 2011 relative to $3.0 million in the first quarter of 2010.

Income derived from service charges on deposits declined by $448,000, or 17%, in the first quarter of 2011 relative to the first quarter of 2010, with the drop centered in overdraft income.  Procedural changes made pursuant to recent regulatory guidance on overdrafts had a larger impact than originally anticipated, with returned item and overdraft charges falling by $495,000 relative to the first quarter of 2010 and by $390,000 relative to the fourth quarter of 2010.  There were no material changes in loan sale and servicing income for the comparative quarters, and no gains or losses on investments.  However, other non-interest income increased by $147,000, or 13%, primarily due to a higher level of debit card interchange fees.

With regard to non-interest expense, salaries and benefits fell slightly for the quarter despite the addition of staff for newer branches, due primarily to our efforts to improve operating efficiencies.  Occupancy expense declined by $165,000, or 9%, due mainly to a drop in depreciation expense and lower maintenance/repair costs, although the January 2011 closure of a branch with a relatively costly lease also contributed to the decline.  Other non-interest expenses fell by $237,000, or 5%, for the first quarter of 2011 relative to the first quarter of 2010.  The largest changes in this category were in marketing expense, which declined $100,000 due mainly to the timing of payments, and data processing expense, which was down $107,000.  Data processing costs declined due to vendor credits for overcharges on processing software in previous years.

A negative income tax provision helped boost net income for the first quarter of 2011.  The negative provision is the result of a high level of tax credits relative to our tax liability, which is favorably impacted by tax-exempt interest income and BOLI income.  Our tax credits include those related to investments in low-income housing tax credit funds, as well as hiring tax credits.

Balance sheet changes during the quarter ended March 31, 2011 include an increase in total assets of $26 million, or 2%, due to growth in investment securities and an increase in cash and balances due from banks, partially offset by lower loan balances.  Surplus liquidity was generated during the quarter from growth in deposits and loan runoff, and much of that liquidity was deployed into longer-term, higher-yielding agency-issued mortgage-backed securities and municipal bonds, hence the $43 million increase in investment balances.  The $15 million increase in cash and balances due from banks was primarily from an $11 million increase in interest-bearing balances at the Federal Reserve Bank, due again to excess liquidity, but we also experienced an increase in vault cash due to a higher level of cash activity in our branches.

Gross loan and lease balances declined $29 million, or 4%, in the first quarter of 2011.  Runoff in the normal course of business, prepayments, transfers to OREO, and charge-offs have reduced loan balances, and weak loan demand from quality borrowers and aggressive competition have hindered our ability to counteract this contraction.  The only loan categories shown on the summary balance sheet which grew during the quarter were agricultural production loans, which increased by $1 million, or 8%, due to seasonal considerations, and SBA loans, which were also up by $1 million, or 8%.

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Sierra Bancorp Financial Results

April 25, 2011

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The $73 million balance of nonperforming assets at March 31, 2011 reflects an increase of $6 million, or 9%, since year-end 2010, but is still below its peak of $78 million reached a year earlier.  Much of the increase for the first quarter consists of a $3.6 million participation purchased in a commercial real estate loan, which was placed on non-accrual status but for which no reserve is currently required based on the appraised value of the collateral.  All of the Company’s impaired assets have been reviewed recently, and are either well-reserved based on current loss expectations or are carried at the fair value of the underlying collateral, net of expected disposition costs.  In addition to nonperforming assets, we had $12.6 million in performing restructured troubled debt (TDR’s) as of March 31, 2011, an increase of only $86,000 relative to year-end 2010.

Our allowance for loan and lease losses was $21.5 million as of March 31, 2011, which represents a slight increase relative to the balance at December 31, 2010.  Even though the allowance for loan and lease losses did not change significantly, our allowance as a percentage of total loans increased by 14 basis points, to 2.76% at March 31, 2011 from 2.62% at December 31, 2010, because loan balances fell during the first quarter.  Our detailed analysis indicates that the Company’s allowance for loan and lease losses should be sufficient to cover credit losses inherent in loan and lease balances outstanding as of March 31, 2011, although no assurance can be given that we will not experience substantial future losses relative to the size of the allowance.

Total deposits increased by $39 million, or 4%, during the first quarter of 2011.  Non-maturity deposits, in particular, experienced significant growth due in part to our aggressive deposit acquisition programs, with non-interest bearing demand deposits up $14 million, or 6%, savings deposits rising $8 million, or 11%, and money market deposits up $9 million, or 6%.  NOW deposits, however, dropped by $10 million, or 5%, due to runoff in our online-only accounts subsequent to interest rate adjustments.  While we reduced non-deposit borrowings by $15 million, we added $15 million in longer-term wholesale-sourced brokered deposits in the first quarter of 2011 to position the Bank to better benefit from the eventuality of rising interest rates.

Total capital increased by $2 million during the first quarter, to $162 million at March 31, 2011.  Because capital increased while risk-adjusted assets declined, our capital ratios continued their upward trend during the first quarter of 2011.

About Sierra Bancorp

Sierra Bancorp is the holding company for Bank of the Sierra (www.bankofthesierra.com), which is in its 34th year of operations and is the largest independent bank headquartered in the South San Joaquin Valley.  The Company has 25 branch offices, an agricultural credit center, an SBA center, and an online “virtual” branch, with over 400 employees.

The statements contained in this release that are not historical facts are forward-looking statements based on management’s current expectations and beliefs concerning future developments and their potential effects on the Company.  Readers are cautioned not to unduly rely on forward looking statements.  Actual results may differ from those projected.  These forward-looking statements involve risks and uncertainties including but not limited to the health of the national and California economies, the Company’s ability to attract and retain skilled employees, customers’ service expectations, the Company’s ability to successfully deploy new technology, the success of branch expansion, changes in interest rates, loan portfolio performance, the Company’s ability to secure buyers for foreclosed properties, and other factors detailed in the Company’s SEC filings, including the “Risk Factors” and “Management’s Discussion and Analysis of Financial Condition and Results of Operations” sections of the Company’s most recent Form 10-K and Form 10-Q.

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Sierra Bancorp Financial Results

April 25, 2011

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