Petra Novotná (née Wagnerová, born 23 February 1966) is a Czech orienteering competitor. At the 1989 World Orienteering Championships in Skövde, she won a silver medal in the relay with the Czechoslovak team.[1] She received a bronze medal in the relay event at the 1993 World Orienteering Championships, together with Maria Honzová, Marcela Kubatková and Jana Cieslarová.[2] In the 1995 World championships, she again received a bronze medal in relay, with the same Czech team.
She finished 16th in the short distance and 19th in the classic distance in 1991. She won the B-final in the short distance in 1993.