Mark Fish (Libertarian Party) was a candidate who sought election to the Alaska House of Representatives to represent District 8. Fish lost the general election on November 6, 2018, after advancing from the primary on August 21, 2018.

Fish is a longtime Alaska resident. He graduated from Anchorage School District in 1977.

In 1984, Fish joined the Alaska Army National Guard. He served until 2003. He rose to the rank of staff sergeant and worked as a military technician.