Isabel Reuss Gerding (born April 10, 1962) is a Mexican Olympic freestyle swimmer who participated in the 1980 Summer Olympics for her native country. Her best result in Moscow, Soviet Union was a sixth place in the Women's 4 × 100 m Freestyle Relay. As of March 2008, she still holds the oldest swimming Mexican Record with her 2:04.19 in the 200 free (long course) from the 1982 World Championships.