Jaroslav Kacmarcík is an orienteering competitor who competed for Czechoslovakia.
At the 1979 World Orienteering Championships in Tampere he won a bronze medal in the relay, together with Petr Uher, Zdenek Lenhart and Jirí Tichácek.At the 1981 World Orienteering Championships he placed 7th in the individual contest, and fourth in the relay with the Czechoslovak team.In 1983 in Zalaegerszeg he placed 6th in the individual contest, and won a silver medal in the relay, together with Vlastimil Uchytil, Pavel Ditrych and Josef Pollák.