Boulder township Flag

Boulder township

County:
Linn County
County Seat:
No
Area (mi²):
35.954
State:
Iowa

Boulder township is located in Linn County, Iowa. Boulder township has a 2025 population of 379. Boulder township is currently declining at a rate of 0% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.

The average household income in Boulder township is $105,598 with a poverty rate of 9.81%. The median age in Boulder township is 36.8 years: 39.3 years for males, and 36.4 years for females.

379
Total Population
11
Density (mi²)
0 0%
Growth

Boulder township Population

Boulder township Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Boulder township includes 96.04% White, and smaller percentages for Native American, Black or African American, Asian, Native Hawaiian or Pacific Islander, other race and multiracial populations.

Population by Race

White

Two or more races

Native American

Black or African American

Asian

Native Hawaiian or Pacific Islander

Other race

Race
Population
Percentage (of total)
White36496.04%
Two or more races143.69%
Native American10.26%
Black or African American00%
Asian00%
Native Hawaiian or Pacific Islander00%
Other race00%

Boulder township Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Boulder township's average per capita income is $53,571. Household income levels show a median of $105,125. The poverty rate stands at 9.81%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.
Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.
Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.
Name
Median
Mean
Married Families$115,278-
Families$107,250$107,963
Households$105,125$105,598
Non Families$38,958$80,865

$53,571

Average Income

$105,125

Median Household Income

9.81%

Poverty Rate

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)