Exhibit 21

ARBITRON INC.

SUBSIDIARIES

	State or
	Other Jurisdiction
Subsidiaries and Their Affiliates:	of Incorporation
Arbitron Holdings Inc.	Delaware
Arbitron International, LLC (1)	Delaware
Ceridian Infotech (India) Private Limited	India
Audience Research Bureau S.A. de C.V.	Mexico
Arbitron Technology Services India Private Limited (1)	India

(1) Is a subsidiary of Arbitron Inc. and Arbitron Holdings, Inc.