WSFS (AM)

WSFS
	WSFS's daytime tower atop Midland Warehouses
	Chicago, Illinois; United States;
Broadcast area	Chicago metropolitan area
Frequency	950 kHz
Programming
Format	Catholic talk and teaching
Network	Relevant Radio
Ownership
Owner	Relevant Radio, Inc.
Sister stations	WKBM; WWCA;
History
First air date	April 7, 1922 (date first licensed)
Former call signs	WAAF (1922–1967); WGRT (1967–1973); WJPC (1973-1994); WEJM (1994–1997); WIDB (1997–1999); WNTD (1999–2026);
Technical information
Licensing authority	FCC
Facility ID	6589
Class	B
Power	1,000 watts (day); 5,000 watts (night);
Transmitter coordinates	41°51′39.12″N 87°41′12.2″W / 41.8608667°N 87.686722°W (day); 41°38′12.13″N 87°33′10.16″W / 41.6367028°N 87.5528222°W (night);
Links
Public license information	Public file; LMS;
Webcast	Listen live
Website	relevantradio.com

WSFS (950 AM) is a radio station licensed to Chicago, Illinois, owned by Relevant Radio, Inc. It simulcasts a Catholic talk and teaching radio format, along with WKBM (930 AM) in Sandwich, Illinois. The stations' programming comes from the Relevant Radio network.

By day, the station is powered at 1,000 watts non-directional. Its daytime transmitter site is on South Western Avenue near 15th Street in Chicago. At night, while increasing its power to 5,000 watts, it also switches to a separate transmitter using a directional antenna with a six-tower array, that tower site is off East 142nd Street near South Manistee Avenue in Burnham, Illinois.