Blatný (feminine: Blatná) is a Czech surname. Notable people with the surname include:
Fanni Blatny (1873–1949), Czech politician František Blatný (1933–2015), Czech chess player, referee and coach Jan Blatný (born 1970), Czech medical doctor and politician Ivan Blatný (1919–1990), Czech poet Lev Blatný (1894–1930), Czech poet Pavel Blatný (born 1968), Czech chess player Zdeněk Blatný (born 1981), Czech ice hockey player
See also
Blatná, a town in the Czech Republic