The “CB” stands for community bank, too. Oregon Seattle Tacoma Olympia Washington Bellingham Columbia Bank received the Northwest Business Development Association 2010 Top Lender

A Strong Northwest Community Bank

Strong Market ShareColumbia ranks #9 in deposit market share out of 111 institutions in Washington State and #12 out of 59 institutions in Oregon.

Information as of March 31, 2011

We remain considerably above the threshold set by the FDIC.

Significant Capital Levels

#1 Market Share Ranking:• Pierce County, WA • Bainbridge Island, WA• Enumclaw Plateau, WA• Jefferson County, OR• Hood River County, OR• Wasco County, OR

Columbia Bank has mitigated risk by avoiding concentration of risk in any one segment.

Balanced Loan Portfolio

Source: FDIC as of June 30, 2010

Strong LiquidityColumbia Bank boasts a liquidityratio of approximately 50%, whichtranslates into over $2.1 billion in available funds to meet the needs of our customers.

5%

10%

15%

20%

25%

30%

FDICThreshold

Q12011

Q22010

Q32010

Q42010

Columbia Banking System, Inc. consolidated ratio.

Knowing our customers – and knowing them well – has never been more important. We appreciate their investment and trust in us. And we believe they appreciate our commitment to them and the communities they live in. For us, banking has always been about people. We take pride in knowing our customers and nurturing their success.

The Columbia Advantage• $4.26 billion in assets; $1.88 billion in loans; $3.34 billion in deposits

• Significant capital levels; total risk based capital exceeding 25%

• Substantial sources of liquidity

• Exceptional core deposits based on customer relationships

• Strong retail system of 88 branches in Washington and Oregon

• Diversified loan and deposit portfolios

• Awarded third place in the large employer category by Seattle Business

Magazine’s 100 Best Companies to Work For 2010 and designated one of

Puget Sound Business Journal’s “Washington’s Best Workplaces 2010”

Columbia Bank ServicesPersonal Banking

Commercial Banking

Professional Banking

Small Business Banking

Online Banking

Mobile Banking

Bill Pay

VISA® Debit Cards

VISA Credit Cards

Lines of Credit

Personal Loans

Residential Lending

Home Equity Loans

Commercial Loans

SBA Loans

Agricultural Loans

Cash Management

International Banking

Commercial Real Estate

Remote Deposit Capture

Merchant Card Services

Business VISA Credit Cards

Private Banking

Trust Services

CB Financial Services*

*Securities and insurance products are offered through PrimeVest Financial Services, Inc., an independent, registered Broker/Dealer. Member FINRA, SIPC. CB Financial Services is a marketing name for PrimeVest. Not a Deposit • Not FDIC Insured • Not Insured By Any Federal Government Agency • Not Guaranteed By The Bank • May Go Down In Value. Advisory services may only be offered by Investment Adviser Representatives in connection with an appropriate PrimeVest Advisory Services Agreement and disclosure brochure as provided.

The “CB” stands for community bank, too.

1-877-272-3678 • ColumbiaBank.comFor additional information:

Pacific Northwest Footprint

Member FDIC Equal Housing Lender

88 Branches Including 6 branches of Bank of Astoria

What’s new at Columbia...

Longview

Portland

Bend

Yakima

Tri-Cities

Astoria

Washington

Oregon

Seattle

Tacoma

Olympia

Washington

Bellingham

Columbia Bank received the Northwest Business Development Association 2010 Top Lender Award for the Bank’s commitment to the SBA 504 program.

Bellingham Branch relocating in June 2011On Monday, June 6, 2011 the Bellingham Branch will relocate to a beautiful new branch location at 211 E Holly Street in the heart of downtown Bellingham.

Bonney Lake Branch awarded Crown in TownTM and Best Bankin Bonney Lake, Washington

Columbia Bank raises over $40,000 for March of Dimes Columbia Bank employees raised over $40,000 in donations for the March of Dimes annual 2011 March for Babies Walks that took place across Washington and Oregon. The funds were raised by 120 registered walkers and distributed to various March of Dimes chapters.

“I am so proud of the good things the people of Columbia Bank do in our communities,” said Melanie Dressel, President and Chief Executive Officer, Columbia Banking System, Inc. and Columbia Bank. “As the 2011 Pierce County Chair for the March for Babies Campaign I am pleased to have so many Columbia Bankers raise funds and contribute to raising awareness about the serious problem of premature birth, birth defects, and infant loss.”

Evergreen Way branch in Everett, Washington now openOn Wednesday, March 9th Columbia Bank celebrated the official opening of its newest branch in Everett, WA, located at 11102 Evergreen Way, with a special ribbon cutting ceremony provided by the Everett Area Chamber of Commerce.

“The opening of this new branch shows Columbia’s long-term commitment to serving the community of Everett and the surrounding areas,” said Marci Miller, manager of the Evergreen Way Branch. “I look forward to building lifelong relationships in our community by helping people and their businesses achieve their goals.” Miller brings more than 20 years of banking experience in the Everett area to her new role at Columbia Bank.

This marks Columbia’s 85th retail branch and second new branch to open this year. The branch offers the full range of Columbia Bank services including personal and business banking, commercial banking, cash management, and wealth management.

Everett

Salem

The Dalles

Mount Vernon

Burlington

Concrete

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About Columbia BankColumbia Bank is a state-chartered, full-service bank headquartered in Tacoma, Washington, with assets of over $4 billion. Columbia Bank serves small and medium-sized businesses, professionals and individuals through 88 banking offices located in Washington and Oregon. Included in Columbia Bank is Bank of Astoria, with 6 branches on the northern coast of Oregon.

The cornerstone of Columbia’s philosophy includes a local, friendly approach to doing business, coupled with all the modern conveniences. Columbia Bank is proud to be a local bank, strongly committed to its customers and the communities it serves.

The Company was reorganized and additional management was added in 1993 in order to take advantage of commercial banking business opportunities resulting from increased consolidation of banks in the Company’s principal market area. Columbia Bank has grown from four branch offices at January 1, 1993 to its present size.

Columbia Philosophy

Columbia’s strong commitment to highly personalized service, varied products and long-standing community presence attracts experienced, talented bankers. Our bankers work closely with our customers, emphasizing personalized, local decision-making in each of the markets they serve. Columbia Bank offers the varied menu of relationship banking products and sophistication of a regional bank, while retaining the appeal and service level of a community bank. We continue to develop a business culture in which customers are afforded the highest priority in all aspects of the Company’s operations.

Our People Make the DifferenceColumbia’s cornerstone is our unwavering commitment to highly personalized service, outstanding banking products and our long-standing support of each community we serve. It’s the quality of our people and our commitment to providing consistently excellent service to our customers and to each other that set us apart. We strive to create an atmosphere that attracts and retains both customers and employees who share a high expectation of service.

ExECuTIVE OFFICERSMelanie J. Dressel President and Chief Executive OfficerColumbia Banking System, Inc. and Columbia Bank

Andy McDonaldExecutive Vice PresidentChief Credit Officer

Mark W. NelsonExecutive Vice President Chief Operating Officer

Kent RobertsExecutive Vice PresidentHuman Resources

Gary SchminkeyExecutive Vice PresidentChief Financial Officer

BOARD OF DIRECTORS

William T. Weyerhaeuser Chairman, Columbia Banking System, Inc. and Columbia Bank / Chairman of the Board of EDEN Bioscience Corporation / Vice Chairman of Potlatch Corporation

Melanie J. DresselPresident and Chief Executive Officer, Columbia Banking System, Inc. and Columbia Bank

John P. FolsomFormer President, Brown & Brown, Inc.

Frederick GoldbergExecutive Committee Member and Chairman of Audit Committee, SaltChuk Resources, Inc. /Managing Partner of Goldberg Investments / Chairman of Panorama City and Gibbons Lane Vineyard & Winery

Thomas M. Hulbert President and Chief Executive Officer, Hulco, Inc. and Winsor Corporation

Thomas L. MatsonOwner and President, Tom Matson Dodge, Inc.

Daniel C. RegisGeneral Partner, Regis Investments

Donald RodmanOwner and Executive Officer, Rodman Realty, Inc.

James M. WillPresident, Titus-Will Enterprises

Community Minded.Community Made.

Though some banks are reducing their commitment to local communities, Columbia Bank continues to play a vital role. We proudly support each community we are a part of and consider it a privilege to support and volunteer in the communities we serve. We believe supporting the events, and serving the greater good alongside our customers, ensures successful community partnerships. This leads to strong customer loyalty, and advocacy in the communities we serve. We believe by building trust and advocacy with our customers, the organizations strength will be sustainable. Here’s a sampling of the fund-raising and charitable organizations our employees and the bank support:

American Cancer SocietyAmerican Heart AssociationAmerican Leadership ForumAmerican Red CrossAnnie Wright SchoolAsia Pacific Cultural CenterAssociated MinistriesAssociation of Washington BusinessBethel School DistrictBellevue Boys & Girls ClubBellevue Chamber of CommerceBellevue Downtown AssociationBoy Scouts Chief Seattle CouncilBoy Scouts of AmericaBoys and Girls Clubs of BellevueBoys and Girls Clubs of Pierce CountyBroadway Center for Performing ArtsCascade Regional Blood ServicesChild & Family Guidance CenterChildren’s Museum of TacomaChristian Brotherhood AcademyChristian Laymen’s OutreachCity of Federal Way, Red, White & Blues FestivalCity of Fircrest, Fircrest Fun DaysCity of Puyallup, Concerts in the ParkClover Park Tech. College FoundationColumbia TheaterCommunity Growth through BusinessCommunity Home Ownership CenterCommunities In SchoolsCorporate Council for the ArtsCystic Fibrosis FoundationDaffodil FestivalEconomic Development BoardEastside Domestic Violence ProgramEmergency Support ShelterExecutive Council for a Greater TacomaExecutive Women InternationalFamily Services of King CountyFederal Way Chamber of CommerceFranciscan Health System

Gig Harbor Little LeagueGig Harbor RotaryGig Harbor Waterfront Retail & Restaurant Assn. Girl Scouts Pacific Peaks CouncilGood Samaritan HospitalGreater Lakes Mental Health FoundationGreater Seattle Business AssociationHumane SocietyIndependent Colleges of WA.Job Carr MuseumJunior AchievementKent RotaryKing County Economic Development CouncilKing County Heart AssociationKiwanis of Gig HarborKorean Women’s AssociationLeMay MuseumLeukemia SocietyLewis River Life Hope Pregnancy CenterLongview Public SchoolsLongview RotaryLongview-Kelso RotaryLower Columbia College FoundationLower Columbia Leadership AcademyMary Bridge Children’s HospitalMBA – Master Builders AssociationMidland Summit Senior CenterMulticare Health FoundationMuscular Dystrophy AssociationMuseum of GlassNorthwest Sinfonietta Old Town Blues FestivalOlympia Chamber of CommerceOlympia/Thurston Chamber FoundationPierce College FoundationPierce County Home Buyers FairPt. Defiance Zoo and AquariumPuyallup Main Street Assoc.Rebuilding TogetherRotary Club of TacomaSalvation ArmySafe Streets

Sexual Assault Center of Pierce CountySt. Anthony’s HospitalSt. Joseph HospitalSt. John Medical Center - Women’s Health Pavilion & Critical Care unit ProjectStadium High SchoolSusan G. Komen FoundationTACIDTacoma Art MuseumTacoma Actors GuildTacoma Chamber of CommerceTacoma City ClubTacoma Community HouseTacoma Concert BandTacoma Goodwill IndustriesTacoma Lawn and Tennis ClubTacoma Little TheatreTacoma OperaTacoma SymphonyTacoma urban Leagueupper Tacoma Business Associationunited Way university of Puget Sounduniversity of Washington, Tacoma university of Washington, Seattleuniversity Place FestivalValley Arts unitedWashington Women’s Education & EmploymentWashington Policy CenterWerlin Reading ProgramWoodland RotaryWoodland SchoolsWorld Trade CenterYMCAYMCA of SW WashingtonYouth Eastside Services (YES)Youth for ChristYWCA Pierce County

Part of the community when it matters most.