St. Mary township Flag

St. Mary township

County:
McLean County
County Seat:
No
Area (mi²):
33.235
State:
North Dakota

St. Mary township is located in McLean County, North Dakota. St. Mary township has a 2026 population of 200. St. Mary township is currently declining at a rate of -0.5% annually but its population has increased by 1.01% since the most recent census, which recorded a population of 198 in 2020.

The median age in St. Mary township is 73 years: 73.4 years for males, and 72 years for females. For every 100 females there are 166.7 males.

200
Total Population
6.0
Density (mi²)
-1 -0.5%
Growth

St. Mary township Population

St. Mary township Population

Year ↓
Population
Growth
Annual Change
2026200-1-0.5%
2025201-1-0.5%
202420210.5%
202320100%
202220110.5%
202120021.01%
2020198-1-0.5%
2019164-2-1.2%
2018166-1-0.6%
201716700%
201616721.21%
201516542.48%
201416153.21%
201315621.3%
201215442.67%
201115032.04%
201014810.68%

Median Age

Overall: 73 years
Female: 72 years
Male: 73.4 years

St. Mary township Adults

There are 168 adults, (168 of whom are seniors) in St. Mary township.

Sex Ratio

Female: 63 (37.5%)
Male: 105 (62.5%)

Demographics

The racial composition of St. Mary township includes 94.05% White, and smaller percentages for and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White15894.05%
Two or more races105.95%
Race
Population ↓
Percentage (of total)
White15894.05%
Two or more races105.95%

St. Mary township Marital Status

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)