Christian Keller (born August 3, 1972, in Essen, North Rhine-Westphalia). is a former medley and freestyle swimmer from Germany, who competed in four consecutive Summer Olympics for his native country, starting in 1992. Four years later the three-time European Junior Champion won the bronze medal with the men's 4×200 m freestyle relay. Keller was named German Swimmer of the Year for two consecutive years: 1994 and 1995.