Metropolis
- County:
- Massac County
- County Seat:
- Yes
- Area (mi²):
- 6.02
- State:
- Illinois
Metropolis is a city located in Massac County, Illinois. Metropolis has a 2026 population of 5,776. It is also the county seat of Massac County. Metropolis is currently declining at a rate of -0.77% annually and its population has decreased by -2.97% since the most recent census, which recorded a population of 5,953 in 2020.