Carsen is a spelling variant of Carson, a Scottish surname of uncertain origin that is usually explained as "son of Carr" or "son of the marsh dweller". The frontiersman Kit Carson made the name a classic of the American West. Carsen entered the top 1000 in 2008 and peaked at number 901 in 2010, but has faded along with Carson itself, slipping to number 2185 in 2025 with 65 births.