Besides The Turtles, three other acts took this song to the US Hot 100:
Dawn featuring Tony Orlando [medley] (#79, 1972)
Captain & Tennille (#53, 1980)
The Nylons (#75, 1987)
In the UK, the Australian singer Jason Donovan made #10 in 1991 with his version, and in 1979, T.G. Sheppard made it to #8 on the country chart with his rendition.
Other artists to cover "Happy Together" include Mel Torme, The Ventures, Hugo Montenegro,
The Vogues, Buck Wild, Vikki Carr, Petula Clark
, Melba Moore, Donny Osmond, David Cook, Percy Faith, Frank Zappa and Weezer.