Ponderosa Pines is a census-designated place (CDP) in Gallatin County, Montana, United States. As of the 2020 census, Ponderosa Pines had a population of 665. Formerly a 13,000-acre ranch, the land was subdivided into 10- and 20-acre parcels and sold by a Hawaiian real estate agency starting in 1972. The lots lacked water, sewer, electricity and road access, and some were on such steep terrain that building would be impossible.
Most of the CDP is in the Three Forks Elementary School District and the Three Forks High School District. A small portion is in Pass Creek Elementary School District and the Manhattan High School District. The Three Forks elementary and high school districts are both a part of Three Forks Public Schools. The Manhattan high school district is a part of Manhattan Public Schools.