Here are the songs that were #1 pop but not on Billboard in 1975. This means they were #1 on Record World, Cash Box, or both. Some of the songs are great, and at least one is awful.
The number after the RW and CB designation is the number of weeks at #1. The * indicates the songs I positively own in some physical form, though I likely also possess the Barry White and Janis Ian tracks.
You’re The First, The Last, My Everything – Barry White (20th Century Records), CB 1, co-written and produced by White
*Boogie On Reggae Woman – Stevie Wonder (Tamla), CB 1, RW 1, produced, arranged, and written by Wonder
*No No Song – Ringo Starr (Apple), CB 1, the last Starr single release to top any U.S. pop charts. Written by Hoyt Axton and David Jackson, produced by Richard Perry
*Jackie Blue – Ozark Mountain Daredevils (A&M), CB 2, RW 1
*How Long – Ace (Anchor), CB 1. Written by lead singer Paul Carrack.
*When Will I Be Loved – Linda Ronstadt (Capitol), CB #1. Written by Phil Everly; produced by Peter Asher.
If at first…
*Please Mr. Please – Olivia Newton-John (MCA), CB #1. Co-written and previously sung by Bruce Welch, a long-time member of The Shadows, who “also wrote several hit singles for the group and Cliff Richard.” He was once engaged to ON-J
*Someone Saved My Life Tonight – Elton John (MCA), CB 1, RW 1 from the Captain Fantastic And The Brown Dirt Cowboy album that went to #1 in its first week of release
At Seventeen – Janis Ian (Columbia), CB 1. Written by Ian when she was 23.
Run Joey Run – David Geddes (Big Tree Records), CB 1. How did I miss this throwback from the 1950s?
Mr. Jaws – Dickie Goodman (Cash), CB 1, RW 1. One of those break-in novelties like his “The Flying Saucer” (1956)
*They Just Can’t Stop It, The (Games People Play) – The Spinners (Atlantic), RW1. Produced, arranged, and conducted by Thom Bell. I never understood why Games People Play was the info in the parentheses.
The #1 Pop Hits of 1965, formally the #1 hits on the Top 100, were right up my sonic alley. In the present tense, I own at least 19 of these 25 songs.