"In the Summertime" is the debut single by British rock band Mungo Jerry. Written and composed by its lead singer, Ray Dorset, it celebrates the carefree days of summer. In 1970, it reached number one in charts around the world, including seven weeks on the UK Singles Chart, two weeks on one of the Canadian charts, and number three on the Billboard Hot 100 singles chart in the US. It became one of the best-selling singles of all-time, eventually selling 30 million copies.

In 1996 Singer and actress Sally Ann Marsh recorded her version with Mike Stock and Matt Aitken, with more than a nod to "Saturday Night" by Whigfield.