Renata Vlachová is an orienteering competitor who competed for Czechoslovakia.
At the 1972 World Orienteering Championships in Jicín she placed 11th in the individual competition, and won a bronze medal in the relay, together with Nada Mertová and Anna Handzlová.
At the 1974 World Orienteering Championships in Viborg she placed fifth in the individual race, and won a bronze medal in the relay, together with Dana Procházková and Anna Handzlová.