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661st Radar Squadron
Emblem of the 671st Radar Squadron
Active	1949-1974
Country	United States
Branch	United States Air Force
Type	General Radar Surveillance

The 661st Radar Squadron is an inactive United States Air Force unit. It was last assigned to the 23d Air Division, Aerospace Defense Command, stationed at Selfridge Air Force Base, Michigan. It was inactivated on 1 July 1974.

The unit was a General Surveillance Radar squadron providing for the air defense of the United States.

• Activated as 661st Aircraft Control and Warning Squadron, 5 December 1949

Redesignated 661st Radar Squadron (SAGE), 1 September 1959

Redesignated 661st Radar Squadron, 1 February 1974

Inactivated on 1 July 1974

• 541st Aircraft Control and Warning Group, 1 January 1951
• 30th Air Division, 6 February 1952
• 4708th Defense Wing, 16 February 1953
• 30th Air Division, 8 July 1956
• Detroit Air Defense Sector, 1 April 1959
• 34th Air Division, 1 April 1966
• 29th Air Division, 14 November 1969
• 23d Air Division, 19 November 1969 - 1 July 1974

Stations

• Selfridge AFB, Michigan, 5 December 1949 - 1 July 1974

 This article incorporates public domain material from the Air Force Historical Research Agency

• Cornett, Lloyd H. and Johnson, Mildred W., A Handbook of Aerospace Defense Organization 1946 - 1980, [1] Archived 23 November 2006 at the Wayback Machine Office of History, Aerospace Defense Center, Peterson AFB, CO (1980).
• Winkler, David F. & Webster, Julie L., Searching the Skies, The Legacy of the United States Cold War Defense Radar Program, [2]^{[dead link]} US Army Construction Engineering Research Laboratories, Champaign, IL (1997).