Olivia
- County:
- McHenry County
- County Seat:
- No
- Area (mi²):
- 35.9
- State:
- North Dakota
Olivia is located in McHenry County, North Dakota. Olivia has a 2025 population of 35 . Olivia is currently declining at a rate of 0% annually and its population has decreased by -2.78% since the most recent census, which recorded a population of 36 in 2020.
The median age in Olivia is 14.8 years: 0 years for males, and 0 years for females. For every 100 females there are 107.3 males.