It was named for Jerome B. Chaffee,[4] Colorado's first United States Senator.[5] At the 2000 census there were 16,242 people, 6,584 households, and 4,365 families living in the county.There were 8,392 housing units at an average density of 8 per square mile (3.1/km2).[12] Chaffee County was long a Republican stronghold, but has recently trended towards the Democrats.Kamala Harris won the county by a larger margin in 2024, becoming the first Democratic presidential nominee to win the county while losing the presidential election since 1908.