Spencer

County:: Clay County
County Seat:: Yes
Area (mi²):: 10.948
State:: Iowa

Spencer is a city located in Clay County, Iowa. Spencer has a 2025 population of 11,549. It is also the county seat of Clay County. Spencer is currently growing at a rate of 0.43% annually and its population has increased by 2.18% since the most recent census, which recorded a population of 11,303 in 2020.

The average household income in Spencer is $78,039 with a poverty rate of 14.11%. The median age in Spencer is 41.3 years: 39.4 years for males, and 43 years for females.

Demographics

The racial composition of Spencer includes 93.72% White, and smaller percentages for Black or African American, Native American, Asian, other race, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Black or African American

Native American

Asian

Other race

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	10,678	93.72%
Two or more races	489	4.29%
Black or African American	78	0.68%
Native American	63	0.55%
Asian	47	0.41%
Other race	38	0.33%
Native Hawaiian or Pacific Islander	0	0%

Spencer Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Spencer's average per capita income is $45,585. Household income levels show a median of $57,068. The poverty rate stands at 14.11%.

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	$100,833	-
Families	$86,703	$103,687
Households	$57,068	$78,039
Non Families	$36,745	$48,423

$45,585

Average Income

$57,068

Median Household Income

14.11%

Poverty Rate