Norris township is located in Mellette County, South Dakota. Norris township has a 2026 population of 165. Norris township is currently declining at a rate of -1.2% annually and its population has decreased by -6.78% since the most recent census, which recorded a population of 177 in 2020.
The median age in Norris township is 21 years: 23.3 years for males, and 18.3 years for females. For every 100 females there are 95.5 males.
Data after 2023 is projected based on recent change
Overall: 21 years
Female: 18.3 years
Male: 23.3 years
There are 91 adults, (6 of whom are seniors) in Norris township.
Female: 88 (51.2%)
Male: 84 (48.8%)
The racial composition of Norris township includes 95.35% Native American, 4.65% White, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 164 | 95.35% |
| White | 8 | 4.65% |