These are the singles that reached number one on the Top 100 Singles chart in 1972 as published in Cash Box magazine.
Issue date Song Artist January 1 "Got to Be There" Michael Jackson January 8 "American Pie" Don McLean January 15 "Brand New Key" Melanie January 22 "American Pie" Don McLean January 29 February 5 February 12 "Let's Stay Together" Al Green February 19 February 26 "Precious and Few" Climax March 4 "Without You" Nilsson March 11 March 18 "Heart of Gold" Neil Young March 25 "A Horse with No Name" America April 1 April 8 April 15 "Rockin Robin" Michael Jackson April 22 "The First Time Ever I Saw Your Face" Roberta Flack April 29 May 6 May 13 May 20 "I'll Take You There" The Staple Singers May 27 June 3 "Oh Girl" The Chi-Lites June 10 "The Candy Man" Sammy Davis, Jr. June 17 "Sylvia's Mother" Dr. Hook & The Medicine Show June 24 "Nice to Be with You" Gallery July 1 "Song Sung Blue" Neil Diamond July 8 "Outa-Space" Billy Preston July 15 "Lean on Me" Bill Withers July 22 July 29 "Too Late to Turn Back Now" Cornelius Brothers & Sister Rose August 5 "Daddy Don't You Walk So Fast" Wayne Newton August 12 "Alone Again (Naturally)" Gilbert O'Sullivan August 19 August 26 September 2 "Brandy (You're a Fine Girl)" Looking Glass September 9 "I'm Still in Love with You" Al Green September 16 "Long Cool Woman in a Black Dress" The Hollies September 23 "Back Stabbers" The O'Jays September 30 "Black and White" Three Dog Night October 7 "Baby, Don't Get Hooked on Me" Mac Davis October 14 "Everybody Plays the Fool" Main Ingredient October 21 "My Ding-a-Ling" Chuck Berry October 28 November 4 "Nights in White Satin" The Moody Blues November 11 "Burning Love" Elvis Presley November 18 "I Can See Clearly Now" Johnny Nash November 25 "I'll Be Around" The Spinners December 2 "I'd Love You to Want Me" Lobo December 9 "Papa Was a Rollin' Stone" The Temptations December 16 "I Am Woman" Helen Reddy December 23 "Me and Mrs. Jones" Billy Paul December 30
See also 1972 in music List of Hot 100 number-one singles of 1972 (U.S.)
References http://members.aol.com/_ht_a/randypny3/cashbox/1972.html https://web.archive.org/web/20130305035647/http://cashboxmagazine.com/archives/70s_files/1972.html https://web.archive.org/web/20080101114729/http://musicseek.info/no1hits/1972.htm