Sumiko Yokoyama

Sumiko Yokoyama (横山 寿美子) is a Japanese cross country skier who competed from 1993 to 2008. Her best World Cup finish was fifth in a 4 x 5 km relay in Switzerland in 2003.

Yokoyama also competed in four Winter Olympics, earning her best finish of tenth in the 4 x 5 km relay at Salt Lake City in 2002. Her best finish at the FIS Nordic World Ski Championships was 8th in the 4 x 5 km relay at Sapporo in 2007.