Carlo Thränhardt (German pronunciation: [ˈkaʁlo ˈtʁɛːnˌhaʁt], audio ; born 5 July 1957) is a retired German high jumper. He excelled at indoor competitions, setting the world indoor record on three occasions between 1984 and 1988. His best mark of 2.42 metres ranks him second on the indoor all-time list one-centimetre behind world record holder Javier Sotomayor of Cuba. The only superior outdoor performances are Sotomayor's world record of 2.45 m, and Mutaz Essa Barshim's clearance of 2.43 m in 2014. Like all modern high jumpers, Thränhardt used the Fosbury Flop style, but of the 16 men in history to have cleared 2.40 m or higher, he was only the second to do so jumping off his right leg. The first was Igor Paklin. At the European Indoor Championships, he won a gold medal in 1983 and four silver medals (1981,84, 86,87). Outdoors, his best championship result was winning a bronze medal at the 1986 European Championships. He also reached the Olympic finals in 1984 and 1988.

He holds the world record in the Masters 55 age group. He set this world record on 24 August 2013 in Eberstadt with 1.90 m. This was an improvement on his former world record of 1.88 m also set in 2013.