Mason City Flag

Mason City

County Seat:
Yes
Area (mi²):
28.289
State:
Iowa

Mason City is a city located in Cerro Gordo County, Iowa. Mason City has a 2026 population of 26,782. It is also the county seat of Cerro Gordo County. Mason City is currently declining at a rate of -0.31% annually and its population has decreased by -1.83% since the most recent census, which recorded a population of 27,280 in 2020.

The median household income in Mason City is $64,804 with a poverty rate of 12%. The median age in Mason City is 42.5 years: 41.3 years for males, and 45.2 years for females. For every 100 females there are 93.3 males.

26.8K
Total Population
947
Density (mi²)
-83 -0.31%
Growth

Mason City Population

Mason City Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202626,782-83-0.31%
202526,865-83-0.31%
202426,948-6-0.02%
202326,954450.17%
202226,909-271-1%
202127,180-100-0.37%
202027,280-71-0.26%
201926,945-120-0.44%
201827,065-293-1.07%
201727,358-49-0.18%
201627,407800.29%
201527,327-100-0.36%
201427,427-241-0.87%
201327,668-86-0.31%
201227,754-194-0.69%
201127,948-94-0.34%
201028,042-37-0.13%
200029,1721320.45%
199029,040-1,104-3.66%
198030,144-235-0.77%
197030,379-263-0.86%
196030,6422,6629.51%
195027,9809003.32%
194027,0803,77616.2%
193023,3043,23916.14%
192020,0658,83578.67%
191011,2304,48466.47%
19006,7462,73968.36%
18904,0071,49759.64%
18802,51000%

Median Age

Overall: 42.5 years
Female: 45.2 years
Male: 41.3 years

Mason City Adults

There are 21,527 adults, (6,215 of whom are seniors) in Mason City.

Sex Ratio

Female: 13,993 (51.7%)
Male: 13,057 (48.3%)

Demographics

The racial composition of Mason City includes 86.26% White, 3.5% Black or African American, and smaller percentages for Asian, Native Hawaiian or Pacific Islander, other race, Native American and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White23,33386.26%
Two or more races1,8356.78%
Black or African American9463.5%
Asian3591.33%
Native Hawaiian or Pacific Islander2670.99%
Other race2390.88%
Native American710.26%
Race
Population ↓
Percentage (of total)
Two or more races1,1404.21%
White3571.32%
Other race2260.84%
Black or African American1740.64%
Race
Population ↓
Percentage (of total)
White22,97684.94%
Black or African American7722.85%
Two or more races6952.57%
Asian3591.33%
Native Hawaiian or Pacific Islander2670.99%
Native American710.26%
Other race130.05%

Mason City Marital Status

Economics and Income Statistics

Mason City 's average per capita income is $44,132. Household income levels show a median of $64,804. The poverty rate stands at 12%.

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$97,471-
Families$84,899$102,435
Households$64,804$81,218
Non Families$38,225$49,201

$44,132

Average Income

$64,804

Median Household Income

12%

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)