Radoslav Rančík (born 6 October 1979) is a Slovak retired professional basketball player.
Rančík started his career with Istra Pula in Croatia.
After joining the Czech club ČEZ Nymburk, he went on to play at Benetton Treviso, Galatasaray Istanbul, Azovmash Mariupol, and Inter Bratislava, before moving back to ČEZ Nymburk.
He played with several teams in the European-wide 2nd-tier level EuroCup competition.
Rančík has been a member of the senior Slovak national basketball team.