Sarnia township is located in Nelson County, North Dakota. Sarnia township has a 2026 population of 47. Sarnia township is currently declining at a rate of 0% annually and its population has increased by 2.17% since the most recent census, which recorded a population of 46 in 2020.
The median age in Sarnia township is 73.6 years: 74.1 years for males, and 0 years for females. For every 100 females there are 314.3 males.
Data after 2023 is projected based on recent change
Overall: 73.6 years
Female: 0 years
Male: 74.1 years
There are 29 adults, (19 of whom are seniors) in Sarnia township.
Female: 7 (24.1%)
Male: 22 (75.9%)
The racial composition of Sarnia township includes 100% White, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| White | 29 | 100% |