UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of report (Date of earliest event reported): February 23, 2010

Marchex, Inc.

(Exact name of Registrant as Specified in its Charter)

520 Pike Street

Suite 2000

Seattle, Washington 98101

(Address of Principal Executive Offices)

(206) 331-3300

(Registrant’s telephone number, including area code)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On February 23, 2010, Russell C. Horowitz, Marchex’s Chairman and Chief Executive Officer, established a new sales plan in accordance with Rule 10b5-1 under the Securities Exchange Act of 1934, as amended (“Rule 10b5-1”) with sales commencing thereunder following the termination of all sales under his previously established sales plan. Under Mr. Horowitz’s new Rule 10b5-1 plan, he will sell up to a maximum of 900,000 shares over a period of up to ten (10) months commencing November 2, 2010 which, if the maximum is sold, represents approximately 10% of Mr. Horowitz’s current direct and indirect holdings of Marchex common stock, approximately 4% of the currently outstanding Class B common stock of Marchex and approximately 3% of the currently outstanding total common stock of Marchex.

Michael Arends, Marchex’s Chief Financial Officer, has amended his existing Rule 10b5-1 sales plan previously disclosed to provide for the sale of up to an additional 67,500 shares, to update specified sales parameters and to provide for sales over a period of up to eighteen (18) months commencing June 2010. The additional 67,500 shares represents approximately 8% of Mr. Arends’ current direct and indirect holdings of Marchex common stock and options, less than 1% of the currently outstanding Class B common stock of Marchex and less than 1% of the currently outstanding total common stock of Marchex.

These plans provide (i) for pre-determined sales of a portion of their Marchex common stock as part of their individual long-term asset diversification and liquidity strategies, subject to certain contingencies, and (ii) for sales of specified share amounts at specific market prices, subject to specified limitations, and require that such sales be disclosed publicly through appropriate filings with the Securities and Exchange Commission.

Marchex permits its directors, officers and certain employees to enter into stock trading plans with respect to Marchex common stock which are intended to qualify for the safe harbor under Rule 10b5-1, subject to Marchex’s applicable guidelines and policies on insider trading. The Rule 10b5-1 plans identified above were adopted in accordance with Marchex’s Code of Conduct for all officers, directors and employees. Rule 10b5-1 permits the implementation of written, prearranged stock trading plans by insiders when the insiders are not in possession of material non-public information. Such plans allow insiders to diversify their holdings and to minimize the market impact of stock sales by spreading them out over time.

The information in this Current Report is being furnished and shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that Section. The information in this Current Report shall not be incorporated by reference into any registration statement or other document pursuant to the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this Current Report to be signed on its behalf by the undersigned hereunto duly authorized.