Dave B. Fern is an American politician in the Montana Senate. Fern was a Democratic member of Montana House of Representatives for District 5.
Fern has served on the Whitefish School District board of trustees.
On November 8, 2016, Fern won the election and became a Democratic member of Montana House of Representatives for District 5. Fern defeated Chet Billi with 56.74% of the votes. On November 6, 2018, as an incumbent, Fern won the election and continued serving District 5. Fern defeated Cindy Dyson with 69.12% of the votes.
Fern's wife is Heather Fern. They have three children. Fern and his family live in Whitefish, Montana.