Mason City Flag

Mason City

County:
Mason County
County Seat:
No
Area (mi²):
1.013
State:
Illinois

Mason City is a city located in Mason County, Illinois. Mason City has a 2026 population of 1,939. Mason City is currently declining at a rate of -1.07% annually and its population has decreased by -6.24% since the most recent census, which recorded a population of 2,068 in 2020.

The median household income in Mason City is $66,524 with a poverty rate of 16.7%. The median age in Mason City is 49.8 years: 49.5 years for males, and 50.3 years for females. For every 100 females there are 94.3 males.

1.9K
Total Population
1,914
Density (mi²)
-21 -1.07%
Growth

Mason City Population

Mason City Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20261,939-21-1.07%
20251,960-22-1.11%
20241,982-9-0.45%
20231,991-22-1.09%
20222,013-20-0.98%
20212,033-35-1.69%
20202,068-7-0.34%
20192,123-22-1.03%
20182,145-26-1.2%
20172,171-4-0.18%
20162,175-29-1.32%
20152,204-39-1.74%
20142,243-9-0.4%
20132,252-31-1.36%
20122,283-26-1.13%
20112,309-34-1.45%
20102,339-4-0.17%

Median Age

Overall: 49.8 years
Female: 50.3 years
Male: 49.5 years

Mason City Adults

There are 1,833 adults, (527 of whom are seniors) in Mason City.

Sex Ratio

Female: 1,111 (51.5%)
Male: 1,048 (48.5%)

Demographics

The racial composition of Mason City includes 95.51% White, and smaller percentages for Two or more races, Black or African American, other race and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White2,06295.51%
Two or more races612.83%
Black or African American180.83%
Other race180.83%
Race
Population ↓
Percentage (of total)
Other race180.83%
Race
Population ↓
Percentage (of total)
White2,06295.51%
Two or more races612.83%
Black or African American180.83%

Mason City Marital Status

Economics and Income Statistics

Mason City 's average per capita income is $46,696. Household income levels show a median of $66,524. The poverty rate stands at 16.7%.

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$94,271-
Families$87,083$89,550
Households$66,524$70,486
Non Families$37,056$48,965

$46,696

Average Income

$66,524

Median Household Income

16.7%

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)