Calvin Oscar Hultman (May 24, 1941 – October 19, 2017) was an American politician in the state of Iowa.

Hultman was born in Omaha, Nebraska and attended Iowa State University and Dana College.

[citation needed] He spent his summers in Moose, Wyoming and later had a summer home in Dubois, Wyoming.

Hultman was in the retail and lumber business, as well as realty, and became a lobbyist after he retired from the state Senate.

Hultman served in the Iowa Senate from 1973 to 1991, as a Republican.