Exhibit 99.1

Press
Information

Contact: Thom Mocarsky
Arbitron Inc.
410-312-8239
thom.mocarsky@arbitron.com

FOR IMMEDIATE RELEASE

Arbitron Inc. Announces $150 Million Unsecured Revolving Credit Facility

NEW YORK; December 20, 2006 – Arbitron Inc. (NYSE: ARB) announced it has entered into a five-year, $150 million unsecured revolving credit facility.

The facility will be available for general corporate purposes, which may include working capital requirements, strategic acquisitions and authorized share repurchases.

The credit facility has been arranged by J.P. Morgan Securities Inc. and includes an expansion feature of up to an additional $50 million.

About Arbitron

Arbitron Inc. (NYSE: ARB) is an international media and marketing research firm serving radio broadcasters, cable companies, advertisers, advertising agencies and outdoor advertising companies in the United States, Mexico and Europe. Arbitron’s core businesses are measuring network and local market radio audiences across the United States; surveying the retail, media and product patterns of local market consumers; and providing application software used for analyzing media audience and marketing information data. The Company has also developed the Portable People Meter^TM system, a new technology for media and marketing research.

Arbitron’s marketing and business units are supported by its research and technology organization, located in Columbia, Maryland. Arbitron has approximately 1,800 employees; its executive offices are located in New York City.

Through its Scarborough Research joint venture with VNU, Inc., Arbitron also provides media and marketing research services to the broadcast television, magazine, newspaper and online industries.

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Portable People Meter^TM is a mark of Arbitron Inc.

This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. The statements regarding Arbitron Inc. and its subsidiaries (“we,” “Arbitron” or the “Company”) in this document that are not historical in nature, particularly those that utilize terminology such as “may,” “will,” “should,” “likely,” “expects,” “anticipates,” “estimates,” “believes,” or “plans,” or comparable terminology, are forward-looking statements based on current expectations about future events, which Arbitron has derived from information currently available to it. These forward-looking statements involve known and unknown risks and uncertainties that may cause our results to be materially different from results implied in such forward-looking statements. These risks and uncertainties include whether we will be able to:

• renew contracts with large customers as they expire;

• successfully execute our business strategies, including implementation of our Portable People Meter^TM system and entering into joint-venture or other material third-party agreements;

• effectively manage the impact of any further consolidation in the radio and advertising agency industries;

• keep up with rapidly changing technological needs of our customer base, including creating new proprietary software systems and new customer products and services that meet these needs in a timely manner;

• successfully manage the impact on our business of any economic downturn generally and in the advertising market in particular;

• successfully manage the impact on costs of data collection due to lower respondent cooperation in surveys, privacy concerns, consumer trends, technology changes and/or government regulations;

• successfully develop and implement technology solutions to measure multi-media and advertising in an increasingly competitive environment; and

• successfully obtain and/or maintain Media Rating Council accreditation for our audience measurement services.

Additional important factors known to Arbitron that could cause actual results to differ materially from our forward-looking statements are identified and discussed from time to time in Arbitron’s filings with the Securities and Exchange Commission, including, in particular, the risk factors discussed under the caption “ITEM 1A. RISK FACTORS” in Arbitron’s Annual Report on Form 10-K for the year ended December 31, 2005.

The forward-looking statements contained in this document speak only as of the date hereof, and Arbitron undertakes no obligation to correct or update any forward-looking statements, whether as a result of new information, future events or otherwise.