John William Grieb (November 19, 1879 – December 10, 1939) was an American gymnast and track and field athlete who competed in the 1904 Summer Olympics.

In 1904 he won the gold medal in the gymnastics' team event and silver medal in the athletics' triathlon event.

He was also sixth in athletics' all-around event, 52nd in gymnastics' all-around event and 90th in gymnastics' triathlon event.

This article about an Olympic medalist of the United States is a stub.

You can help Wikipedia by expanding it.This biographical article related to a United States artistic gymnast is a stub.