Don Hahnfeldt (April 29, 1944 – December 24, 2017) was an American politician.

He received his bachelor's degree from Roosevelt University and his master's degrees from Naval Postgraduate School and from Valdosta State University.

Hahnfeldt then served in the United States Navy and became a submarine captain.

After serving on the Sumter County Board of Commissioners from 2012 until 2016, he then served as the Republican member of the Florida House of Representatives for District 33, which includes Sumter County and parts of Lake County and Marion County, Florida.

[3][4] Hahnfeldt died from cancer at the age of seventy-three.