Jan Micka (Czech pronunciation: [ˈjan ˈmɪtska]; born 15 January 1995 in Prague) is a Czech swimmer, who specialized in long-distance freestyle events.

Micka is a member of the swimming team for USK Praha, and is coached and trained by Jaroslava Passerova.

[1] Micka qualified for the men's 1500 m freestyle, as Czech Republic's youngest swimmer (aged 17), at the 2012 Summer Olympics in London, by eclipsing a FINA B-standard entry time of 15:28.49 from the European Junior Championships in Antwerp, Belgium.

[3][4] He challenged six other swimmers on the first heat, including two-time Olympian Ediz Yıldırımer of Turkey.

Micka edged out Iceland's Anton Sveinn McKee to take a second spot by six hundredths of a second (0.06) in 15:29.34.