Calvin Callahan (born March 2, 1999) is an American Republican politician.

[2] Callahan was elected to the Lincoln County Board of Supervisors in April 2018, defeating incumbent Kirby Crosby.

Callahan has been active with the county's Economic Development division, and serves as Lincoln County's sole representative on the regional Central Wisconsin Economic Development Board.

[2] After incumbent representative Mary Felzkowski opted not to seek re-election to the Wisconsin State Assembly and instead run for the Wisconsin State Senate, Callahan announced his candidacy to succeed her.

[5] He defeated Don Nelson in the Republican primary and Democratic nominee Tyler Ruprecht in the November general election.