Werner Gustaf Hilmer Hardmo (25 March 1917 – 16 September 2010) was a Swedish race walker.

He was born as Werner Pettersson, but in 1943 changed his last name to Hardmo after his birthplace.

He was disqualified in the 10 km races at the 1946 European Championships and 1948 Summer Olympics.

He retired shortly thereafter and ran his grocery store in Kumla.

This biographical article relating to Swedish athletics is a stub.