SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 11-K

ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

(Mark One)

[X] Annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934

for the fiscal year ended December 31, 2003

Or

[  ] Transition report pursuant to Section 15(d) of the Securities Exchange Act of 1934

for the transition period from_________to________

Commission file number 000-25867

A. Full title of the plan and the address of the plan, if different from that of
the issuer named below.

West Coast Bancorp
401(k) Plan

B. Name of issuer of the securities held pursuant to the plan and the address
of its principal executive office:

West Coast Bancorp
5335 Meadows Road – Suite 201
Lake Oswego, Oregon 97035

WEST COAST BANCORP 401(k) PLAN

TABLE OF CONTENTS

	Page
REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM		1
FINANCIAL STATEMENTS AS OF AND FOR THE YEARS ENDED DECEMBER 31, 2003 AND 2002:
Statements of Net Assets Available for Benefits		2
Statements of Changes in Net Assets Available for Benefits		3
Notes to Financial Statements		4–8
SUPPLEMENTAL SCHEDULE AS OF DECEMBER 31, 2003:
Line 4i—Schedule of Assets Held for Investment Purposes at Year End		9
Signature		10
Exhibit 23.1 Consent of Deloitte & Touche LLP

Schedules not filed herewith are omitted because of the absence of the conditions under which they are required.

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Administrative Committee
West Coast Bancorp 401(k) Plan:

We have audited the accompanying statements of net assets available for benefits of West Coast Bancorp 401(k) Plan (the “Plan”) as of December 31, 2003 and 2002, and the related statements of changes in net assets available for benefits for the years then ended. These financial statements are the responsibility of the Plan’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, such financial statements present fairly, in all material respects, the net assets available for benefits of the Plan as of December 31, 2003 and 2002, and the changes in net assets available for benefits for the years then ended, in conformity with accounting principles generally accepted in the United States of America.

Our audits were conducted for the purpose of forming an opinion on the basic financial statements taken as a whole. The supplemental schedule listed in the Table of Contents is presented for the purpose of additional analysis and is not a required part of the basic financial statements, but is supplementary information required by the Department of Labor’s Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This schedule is the responsibility of the Plan’s management. The supplemental schedule has been subjected to the auditing procedures applied in our audit of the basic 2003 financial statements and, in our opinion, is fairly stated in all material respects when considered in relation to the basic financial statements taken as a whole.

DELOITTE & TOUCHE LLP

Portland, Oregon
June 25, 2004

WEST COAST BANCORP 401(k) PLAN

STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
DECEMBER 31, 2003 AND 2002

	2003		2002
ASSETS:
Investments at fair value:
Mutual funds	$	8,329,136	$	5,931,338
Employer common stock		3,228,460		2,376,423
Money market funds		2,863,635		2,575,807
Participant loans		375,948		265,611
Total investments		14,797,179		11,149,179
RECEIVABLES—Employer contributions		539,067		463,974
NET ASSETS AVAILABLE FOR BENEFITS	$	15,336,246	$	11,613,153

See notes to financial statements.

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WEST COAST BANCORP 401(k) PLAN

STATEMENTS OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
YEARS ENDED DECEMBER 31, 2003 AND 2002

	2003		2002
ADDITIONS TO NET ASSETS:
Investment income (loss):
Interest and dividends	$	225,936	$	211,968
Net appreciation (depreciation) in fair value of investments		2,479,212		(1,002,741	)
Net investment income (loss)		2,705,148		(790,773	)
Contributions:
Employer matching contributions		569,763		463,974
Participant contributions		1,589,443		1,403,592
Employee rollover contributions		21,762		39,838
Total contributions		2,180,968		1,907,404
Total additions to net assets		4,886,116		1,116,631
DEDUCTIONS:
Benefits paid to participants		1,146,623		1,266,418
Administrative expenses		16,400		13,050
Total deductions		1,163,023		1,279,468
NET INCREASE (DECREASE) IN NET ASSETS AVAILABLE FOR BENEFITS		3,723,093		(162,837	)
NET ASSETS AVAILABLE FOR BENEFITS, Beginning of year		11,613,153		11,775,990
NET ASSETS AVAILABLE FOR BENEFITS, End of year	$	15,336,246	$	11,613,153

See notes to financial statements.

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WEST COAST BANCORP 401(K) PLAN

NOTES TO FINANCIAL STATEMENTS
YEARS ENDED DECEMBER 31, 2003 AND 2002

1.	DESCRIPTION OF THE PLAN
	The following description of the West Coast Bancorp 401(k) Plan (the “Plan”) is provided for general information purposes only. Participants should refer to the Summary Plan Description for more complete information regarding amount and type of benefits, vesting, and other provisions of the Plan.
	General—The Plan is a defined contribution plan covering all eligible employees of West Coast Bancorp and its wholly-owned subsidiaries (the “Company”), except those covered by collective bargaining agreements. Employees are eligible to participate in the Plan when they have been employed for six months, and reached 18 years of age. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 (“ERISA”).
	The Plan Administrator is a committee appointed by the Board of Directors of West Coast Bancorp. West Coast Trust Company, a subsidiary of the Company, is the trustee of the Plan. Federated Investors is an asset custodian and recordkeeper of the Plan.
	Contributions—In each plan year, the employer may contribute a matching contribution equal to a percentage of each participant’s elective deferral contributions for that year. The employer may also make supplemental and discretionary profit sharing contributions. Supplemental and discretionary contributions are allocated to the participants’ accounts on a pro-rata basis based on eligible compensation. All employer related contributions were invested in West Coast Bancorp common stock through 1999. Effective beginning 2000, employer contributions can be invested in any of the Plan’s investment options.
	Effective January 1, 2003, participants may voluntarily contribute between 1% and 100% of their total compensation as a salary reduction each year that they are a plan participant. Previously, participants could contribute between 1% and 15% of their total compensation. The actual amount of their compensation that can be deferred each year is subject to limits imposed by the Internal Revenue Code (the “Code”), which was $12,000 and $11,000 for 2003 and 2002, respectively.
	Participant Accounts—A separate account is maintained for each participant, which is credited with the participant’s contribution, the allocation of the employer’s contribution, as determined above, and an allocation of investment earnings or losses. The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account.
	Vesting—Participants are fully vested in their salary reduction contributions, rollovers, and related earnings at all times.

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Participants vest in the Company’s matching and discretionary contribution portion of their accounts plus actual earnings or losses thereon based on years of continuous service as follows:

	Vesting
Years of Service	Percentage
Less than 1		0	%
1		20	%
2		40	%
3		60	%
4		80	%
5		100	%

Forfeitures of terminated participants’ nonvested account balances are used to reduce the employer’s matching contributions for the plan year in which the forfeiture occurs or to restore previously forfeited amounts.

Participant Loans—Participants may borrow from their fund accounts a maximum equal to the lesser of $50,000 or 50% of their vested account balance. Loan transactions are treated as a transfer to (from) the investment fund from (to) the Participant Loans Fund. Loan terms range from 1-5 years or more if for the purchase of a primary residence. The loans are secured by the balance in the participant’s account and bear interest at a rate commensurate with local prevailing rates (prime rate) determined as market conditions warrant by the Plan Administrator. Interest rates range from 6.00% to 11.50% at December 31, 2003. Principal and interest is paid ratably through semi-monthly payroll deductions.

Payment of Benefits—The benefit to which a participant is entitled is the benefit that can be provided from the participant’s vested account. On termination of service due to normal retirement, death or disability, the participant’s account balance will be deemed fully vested. Normal retirement is the participant’s 65th birthday. For termination of service due to other reasons, a participant may receive the value of the vested interest in his or her account as a lump sum distribution.

Investment Options—Upon enrollment in the Plan, contributions are participant-directed into the following investment options:

Federated Investors:

Federated Automated Cash Management Trust

Federated Bond Fund

Federated High Income Bond Fund

Federated International Equity Trust Fund ⁽¹⁾

Federated Kaufmann Fund

Federated Managed Moderate Growth Fund ⁽¹⁾

Federated Managed Conservative Growth Fund ⁽¹⁾

Federated Managed Income Fund ⁽¹⁾

Federated Max-Cap Fund

Federated Prime Obligations Fund

Federated Stock and Bond Fund

Federated Stock Trust

Federated Total Return Bond Fund

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Other Investment Options:

American Century Strategic Allocations Conservative Fund

American Century Strategic Allocations Moderate Fund

American Funds Growth Fund of America

American Funds Euro Pacific Growth Fund

Janus Fund ⁽¹⁾

West Coast Bancorp common stock

	(1) Fund no longer available as of 2003.
	Participants may change their investment options and direct transfers between investment accounts at any time. West Coast Bancorp common stock was required to be retained by all participants under the age of 55 through 1999. Effective in 2000, the Plan was amended to remove this requirement.
	Plan Termination—Although it has not expressed any intent to do so, the employer has the right under the Plan to discontinue its contributions at any time and to terminate the Plan subject to the provisions of ERISA. In the event of Plan termination, participants will become fully vested in their accounts.
2.	SIGNIFICANT ACCOUNTING POLICIES
	Basis of Accounting—The financial statements of the Plan are prepared under the accrual method of accounting.
	Use of Estimates—The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect reported amounts of assets and liabilities, and changes therein, and disclosures of contingent assets and liabilities. Actual results could differ from those estimates.
	Investment Valuation and Income Recognition—The Plan’s investments are maintained by Federated Investors, except for West Coast Bancorp common stock, which is maintained by West Coast Trust.
	The Plan’s investments are stated at fair value, which is based upon quoted market prices, if available. Money market balances are valued at cost plus reinvested interest. Participant loans are valued at net amortized cost, which approximates fair value.
	Purchases and sales are accounted for on the trade-date basis. Dividend income is recorded on the ex-dividend date. Interest income is reported as earned. Cost of common stock shares sold and cost of mutual fund units sold are determined by the specific identification method.
	Administrative Expenses—The employer may pay all expenses of administering the Plan including, but not limited to, the trustee’s or custodian’s fees, attorney fees, and expenses incurred by persons or entities to whom fiduciary duties have been delegated. If these expenses are not paid by the employer, there shall be a lien against and paid from the Plan, except for the items the payment of which would constitute a prohibited transaction.
	Income Tax Status—The Plan received a favorable determination letter from the Internal Revenue Service effective October 2002. The Plan has been amended since receiving the determination letter; however, the Plan Administrator and the Plan’s tax counsel believe that the Plan is currently designed and being operated in compliance with the applicable requirements of the Code. Accordingly, no provision for income taxes has been included in the Plan’s financial statements.

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3.	EMPLOYER CONTRIBUTION
	For the years ended December 31, 2003 and 2002, the employer made matching contributions of $569,763 and $463,974, respectively. For the years ended December 31, 2003 and 2002, the employer did not make a profit sharing contribution.
4.	BENEFITS PAYABLE TO TERMINATED PARTICIPANTS
	At December 31, 2003 and 2002, net assets available for benefits allocated to terminated employees were $498,613 and $492,517, respectively. The amount represents the participants’ vested interest in the Plan upon termination of employment.
5.	RELATED-PARTY TRANSACTIONS
	Certain Plan investments are shares of investment funds managed by Federated Investors as of and for the years ended December 31, 2003 and 2002, respectively, which is a custodian of the Plan and, therefore, these transactions qualify as party-in-interest.
	The employer also provides accounting and administrative services to the Plan at no charge. In addition, the Plan invests in common stock of the Company.
6.	SUMMARY OF INVESTMENTS

	2003			2002
Investments at fair value as determined by quoted market prices:
Mutual Funds:
Federated Stock and Bond Fund	$	1,738,513	*	$	1,474,897	*
Federated Stock Trust		1,683,139	*		1,375,226	*
Federated Max-Cap Fund		1,080,593	*		681,148	*
Federated Managed Moderate Growth Fund					294,612
Federated Kaufman Fund		1,363,586	*		527,582
Federated International Equity Trust Fund					292,215
Federated Managed Conservative Growth Fund					176,065
Federated Bond Fund		354,102			324,637
Federated High Income Bond Fund		195,745			121,531
Federated Managed Income Fund					157,039
Federated Total Return Bond Fund		120,445
American Century Strategic Allocations Conservative Fund		204,611
American Century Strategic Allocations Moderate Fund		519,077
American Funds Growth Fund of America		562,163
American Funds Euro Pacific Growth Fund		507,162
Janus Fund					506,386
	$	8,329,136		$	5,931,338

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	2003			2002
Investments at fair value as determined by quoted market prices:
Employer Common Stock—West Coast Bancorp common stock	$	3,228,460	*	$	2,376,423	*
Money Market Funds:
Federated Automated Cash Management Trust					2,575,807	*
Federated Prime Obligations Fund		2,863,635	*
Participant loans		375,948			265,611
Total investments	$	14,797,179		$	11,149,179

* Represents 5% or more of net assets available for benefits at December 31.

The Plan’s investments including investments bought, sold, and held during the year appreciated (depreciated) in value as follows:

		2003		2002
Net change in fair value:
Investments at fair value as determined by quoted market prices:
Mutual funds	$	1,689,614	$	(1,211,130	)
West Coast Bancorp common stock		1,015,534		208,389
Total	$	2,705,148	$	(1,002,741	)

7.	RECONCILIATION OF FINANCIAL STATEMENTS TO FORM 5500
	The following is a reconciliation of amounts per the financial statements to Form 5500.

	December 31, 2003
	Financial
	Statements		Per 5500
Benefits paid to participants	$	1,146,623	$	1,138,668
Net assets available for benefits—beginning of year		11,613,153		11,605,198

	December 31, 2002
	Financial
	Statements		Per 5500
Deemed distributions of participant loans	$	—	$	7,955
Net assets available for benefits—end of year		11,613,153		11,605,198
Participant loans		265,611		257,656

******

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WEST COAST BANCORP 401(k) PLAN

LINE 4i—SCHEDULE OF ASSETS HELD FOR INVESTMENT PURPOSES AT YEAR END DECEMBER 31, 2003

			(e)
	(b) Identity of Issue	(d)	Current
(a)	(c) Description of Investment	Cost **	Value
	MUTUAL FUNDS:
*	Federated Investors:
	Stock and Bond Fund		$	1,738,513
	Stock Trust			1,683,139
	Max-Cap Fund			1,080,593
	Kaufmann Fund			1,363,586
	Bond Fund			354,102
	High Income Bond Fund			195,745
	Total Return Bond Fund			120,445
	Total Federated Mutual Funds			6,536,123
	American Century Strategic Allocations Conservative Fund			204,611
	American Century Strategic Allocations Moderate Fund			519,077
	American Funds Growth Fund of America			562,163
	American Funds Euro Pacific Growth Fund			507,162
	Total Mutual Funds			8,329,136
	MONEY MARKET FUNDS:
*	Federated Prime Obligations Fund			2,863,635
	EMPLOYER COMMON STOCK:
*	West Coast Bancorp Common stock			3,228,460
	Participant loans, interest rate 6.00% - 11.50%, maturing 1/12/04 through 2/5/18			375,948
	TOTAL INVESTMENTS		$	14,797,179

*	Party-in-interest
**	Not required for participant-directed investments

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SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the plan administrator of the West Coast Bancorp 401(k) Plan has duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized.

	WEST COAST BANCORP 401(k) PLAN
	By:	WEST COAST BANCORP, the plan administrator
Date: June 28, 2004	By:	/s/ Laurie Ferris
		West Coast Bancorp
		401(k) Plan Administrative Committee Representative

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EXHIBIT INDEX

Document	Exhibit Number
Independent Auditors’ Consent		23.1

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