Jan Janků (born 10 August 1971 in Česká Lípa) is a former Czech high jumper.
His younger brother Tomáš Janků is also a prominent high jumper.
He is married to Katerina Babova, a sister of the high jumper Jaroslav Bába.
The couple has one son, Jan Junior, born in 2007.
This biographical article relating to Czech athletics is a stub.