Marietta
- County:
- Fulton County
- County Seat:
- No
- Area (mi²):
- 0.273
- State:
- Illinois
Marietta is a village located in Fulton County, Illinois. Marietta has a 2026 population of 100. Marietta is currently growing at a rate of 1.01% annually but its population has decreased by -1.96% since the most recent census, which recorded a population of 102 in 2020.
The median household income in Marietta is $52,500 with a poverty rate of 29.55%. The median age in Marietta is 34.7 years: 44.2 years for males, and 34.2 years for females. For every 100 females there are 103.1 males.