Below is the list I made for the greatest one-hit wonders of the 1970s.
The song I picked as the greatest of that era is "Baker Street" by Gerry Rafferty.
Escape (The Pina Colada Song) (Rupert Holmes)
Tubular Bells (Mike Oldfield)
One Toke Over The Line (Brewer & Shipley)
Ride, Captain, Ride (The Blues Image)
Reflections Of My Life (Marmalade)
Spirit In The Sky (Norman Greenbaum)
Mississippi Queen (Mountain)
O-o-h Child (Five Stairsteps)
Tighter, Tighter (Alive N Kickin')
In The Summertime (Mungo Jerry)
Neanderthal Man (Hotlegs)
Joanne (First National Band)
Vehicle (The Ides Of March)
Ma Belle Amie (Tee Set)
The Rapper (The Jaggerz)
Montego Bay (Bobby Bloom)
We Gotta Get You A Woman (Runt)
I'd Love To Change The World (Ten Years After)
One Tin Soldier (The Legend Of Billy Jack) (Original Caste)
The Night Chicago Died (Paper Lace)
Play That Funky Music (Wild Cherry)
Love Train (The Trammps)
Tell Me Something Good (Rufus)
Run, Run, Run (Jo Jo Gunne)
Take This Job And Shove It (Johnny Paycheck)
On The Dark Side (Eddie and the Cruisers)
Different Drum (The Stone Ponies)
Sunshine (Jonathan Edwards)
Joy (Apollo 100 Featuring Tom Parker)
Bang A Gong (Get It On) (T. Rex)
Crazy Mama (J.J. Cale)
Hotwire (Trapeze)
Hot Rod Lincoln (Commander Cody and His Lost Planet Airmen)
Day By Day (Godspell)
Layla (Derek and the Dominos)
Hold Your Head Up (Argent)
Easy Livin' (Uriah Heep)
The City Of New Orleans (Arlo Guthrie)
From The Beginning (Emerson, Lake & Palmer)
Good Time Charlie's Got The Blues (Danny O'Keefe)
Also Sprach Zarathustra (2001) (Deodato)
Ghosts (Japan)
Dead Skunk (Loudon Wainwright III)
Walk On The Wild Side (Lou Reed)
The Night The Lights Went Out In Georgia (Vicki Lawrence)
Hocus Pocus (Focus)
Right Place Wrong Time (Dr. John)
Brother Louie (Stories)
My Maria (B.W. Stevenson)
Jim Dandy (Black Oak Arkansas)
Eres Tu (Touch The Wind) (Mocedades)
Seasons In The Sun (Terry Jacks)
Indiana Wants Me (R. Dean Taylor)
All Right Now (Free)
Rock and Roll, Hoochie Koo (Rick Derringer)
Smokin' In The Boys' Room (Brownsville Station)
Dream Weaver, Love Is Alive (Gary Wright)
Happy Days (Pratt & McClain)
Baker Street (Gerry Rafferty)
The Entertainer (Marvin Hamlisch)
I Can Help (Billy Swan)
King Fu Fighting (Carl Douglas)
Autobahn (Kraftwerk)
Third Rate Romance (The Amazing Rhythym Aces)
Love Hurts (Nazareth)
Love Is The Drug (Roxy Music)
Fooled Around and Fell In Love (Elvin Bishop)
Afternoon Delight (Starland Vocal Band)
The Boys Are Back In Town (Thin Lizzy)
Turn The Beat Around (Vicki Sue Robinson)
Cat Scratch Fever (Ted Nugent)
Werewolves Of London (Warren Zevon)
Rock 'n Roll Parts I & II (Gary Glitter)
Oh Well (The Rockets)
Feelings (Morris Albert)
Gonna Fly Now (Theme From Rocky) Bill Conti
Hot Child In The City (Nick Gilder)
Cruel To Be Kind (Nick Lowe)
Black Betty (Ram Jam)
Flirtin' With Disaster (Molly Hatchet)
Video Killed The Radio Star (The Buggles)
Shannon (Henry Gross)
Muskrat Love (Willis Alan Ramsey)
All The Young Dudes (Mott The Hoople)
Rock On (David Essex)
The Hustle (Van McCoy)
Radar Love (Golden Earring)
Stuck In The Middle With You (Stealer's Wheel)