Mason City Flag

Mason City

County Seat:
Yes
Area (mi²):
27.856
State:
Iowa

Mason City is a city located in Cerro Gordo County, Iowa. Mason City has a 2025 population of 26,664. It is also the county seat of Cerro Gordo County. Mason City is currently declining at a rate of -0.45% annually and its population has decreased by -2.22% since the most recent census, which recorded a population of 27,269 in 2020.

The average household income in Mason City is $78,957 with a poverty rate of 10.56%.The median age in Mason City is 43 years: 41.3 years for males, and 45.2 years for females.

26.7K
Total Population
957
Density (mi²)
-121 -0.45%
Growth

Mason City Population

Mason City Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Mason City includes 88.43% White, 3.34% Black or African American, and smaller percentages for Asian, other race, Native Hawaiian or Pacific Islander, Native American and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White23,99588.43%
Two or more races1,4525.35%
Black or African American9053.34%
Asian3361.24%
Other race2120.78%
Native Hawaiian or Pacific Islander1680.62%
Native American670.25%

Mason City Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Mason City's average per capita income is $42,690. Household income levels show a median of $62,369. The poverty rate stands at 10.56%.

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$88,871-
Families$79,860$96,623
Households$62,369$78,957
Non Families$39,690$51,864

$42,690

Average Income

$62,369

Median Household Income

10.56%

Poverty Rate

Nearby Cities

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)