These are the number-one singles of 1977 according to the Top 100 Singles Chart in Cash Box magazine
+KeyThe yellow background indicates the #1 song of 1977.
Issue date Song Artist January 1 "You Don't Have to Be a Star (To Be in My Show)" Marilyn McCoo & Billy Davis Jr. January 8 January 15 "Car Wash" Rose Royce January 22 January 29 "I Wish" Stevie Wonder February 5 "Blinded By The Light" Manfred Mann's Earth Band February 12 "Torn Between Two Lovers" Mary MacGregor February 19 February 26 March 5 "Evergreen (Love Theme from A Star Is Born)" Barbra Streisand March 12 March 19 March 26 "Rich Girl" Daryl Hall & John Oates April 2 "Dancing Queen" ABBA April 9 "Rich Girl" Daryl Hall & John Oates April 16 "Don't Give Up on Us" David Soul April 23 "Hotel California" Eagles April 30 "Southern Nights" Glen Campbell May 7 "When I Need You" Leo Sayer May 14 May 21 May 28 "Sir Duke" Stevie Wonder June 4 "I'm Your Boogie Man" KC & The Sunshine Band June 11 "Dreams" Fleetwood Mac June 18 "Got To Give It Up (pt. 1)" Marvin Gaye June 25 "Gonna Fly Now" Bill Conti July 2 "Undercover Angel" Alan O'Day July 9 "Da Doo Ron Ron" Shaun Cassidy July 16 July 23 "I'm in You" Peter Frampton July 30 "I Just Want To Be Your Everything" Andy Gibb August 6 August 13 August 20 "Best Of My Love" Emotions August 27 September 3 September 10 "(Your Love Has Lifted Me) Higher and Higher" Rita Coolidge September 17 "Don't Stop" Fleetwood Mac September 24 "Star Wars Theme/Cantina Band" Meco October 1 October 8 "You Light Up My Life" Debby Boone October 15 October 22 October 29 November 5 November 12 November 19 November 26 December 3 "Don't It Make My Brown Eyes Blue" Crystal Gayle December 10 December 17 "How Deep Is Your Love" Bee Gees December 24 December 31
References http://www.cashboxmagazine.com/archives/70s_files/1977.html
See also 1977 in music Hot 100 number-one hits of 1977 (United States) by Billboard magazine RPM number-one hits of 1977 for the #1 hits in Canada