Janny Spijker is a Dutch water polo player. She competed for the Dutch women's national water polo team in the 1986 World Aquatics Championships, 1991 World Aquatics Championships, 1994 World Aquatics Championships, 1988 Women's Water Polo World Cup, 1989 FINA Women's Water Polo World Cup, 1991 FINA Women's Water Polo World Cup, and 1993 FINA Women's Water Polo World Cup.