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
Arbitron Technology Services India Private Limited (1)	India

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