Mányoki Attila (born 3 September 1973) is a marathon swimmer from Hungary. The former butterfly did his first 12.5-km Lake Balaton race in 1989 between the towns of Balatonfüred and Siófok. His first international swim was in Greece (35 km) between the cities of Kalamata and Koroni. This race was followed by FINA World Cup events in Italy, Germany, Serbia, Greece, Egypt, Brazil and Argentina. He also did open water swims in the Netherlands, Belgium, Croatia, Serbia and Greece. In 2003, he did the Canadian races in the FINA World Cup and the 39 km Around Atlantic City Swim and is a member of the 24-hour club.
In 2008, he swam across Lake Balaton between Balatonkenese and Keszthely, taking 25 hours and 32 minutes to complete this distance of 79.6 km. He also completed a solo Beltquerung swim in the Baltic Sea between Denmark and Germany.