Madison County, Montana

Madison County, Montana
Madison County Courthouse in Virginia City
Location within the U.S. state of Montana
Coordinates: 45°18′N 111°55′W / 45.3°N 111.92°W / 45.3; -111.92
Country United States
State Montana
Founded1865
Named afterJames Madison
SeatVirginia City
Largest townEnnis
Area
 • Total
3,603 sq mi (9,330 km2)
 • Land3,587 sq mi (9,290 km2)
 • Water15 sq mi (39 km2)  0.4%
Population
 (2020)
 • Total
8,623
 • Estimate 
(2024)
9,753
 • Density2.404/sq mi (0.9282/km2)
Time zoneUTC−7 (Mountain)
 • Summer (DST)UTC−6 (MDT)
Congressional district1st
Websitewww.madison.mt.gov
  • Montana county number 25

Madison County is a county in the U.S. state of Montana. As of the 2020 census, the population was 8,623. Its county seat is Virginia City. The county was founded in 1865; at the time it was part of the Montana Territory.