Spencer, Iowa Population 2021

10,834
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Spencer is a city located in Clay County Iowa. It is also the county seat of Clay County. With a 2020 population of 10,834, it is the 35th largest city in Iowa and the 2934th largest city in the United States . Spencer is currently declining at a rate of -0.54% annually and its population has decreased by -3.55% since the most recent census, which recorded a population of 11,233 in 2010. Spencer reached it's highest population of 11,726 in 1980. Spanning over 11 miles, Spencer has a population density of 991 people per square mile.

The average household income in Spencer is $61,108 with a poverty rate of 12.11%. The median rental costs in recent years comes to $684 per month, and the median house value is $128,800. The median age in Spencer is 43.5 years, 42.4 years for males, and 44.5 years for females.

Spencer Demographics

According to the most recent ACS, the racial composition of Spencer was:

  • White: 95.50%
  • Two or more races: 2.59%
  • Asian: 0.89%
  • Other race: 0.65%
  • Black or African American: 0.37%
  • Native American: 0.00%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Spencer, Iowa is 10,834 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 11,011.The last official US Census in 2010 recorded the population at 11,233.

Spencer, Iowa Population 2021

2019 and 2020 population is estimated by projecting the raw 2018 numbers.

Year Population Growth Growth Rate
202115,836-90-0.57%
202015,926-90-0.57%
201916,016-90-0.56%
201816,106-35-0.22%
201716,141-154-0.95%
201616,295-203-1.25%
201516,498140.08%
201416,484460.28%
201316,438-101-0.61%
201216,539-58-0.35%
201116,597-37-0.22%
201016,6340.00%

Spencer Metro Area Population by Year

Population by Race

Race Population Percentage
White10,55595.50%
Two or More Races2862.59%
Asian980.89%
Some Other Race720.65%
Black or African American410.37%
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Spencer Population by Race

Spencer Population Pyramid $2021

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Spencer Median Age

43.5


Total

42.4


Male

44.5


Female

Spencer Adults

There are 8,509 adults, (2,437 of whom are seniors) in Spencer.

Spencer Age Dependency

82

Age Dependency Ratio

40.1

Old Age Dependency Ratio

41.9

Child Dependency Ratio

Spencer Sex Ratio

Female

5,809

52.56%

Male

5,243

47.44%

Spencer Population by Age

Spencer Renter vs Owner Occupied by Household Type

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Spencer Household Types

Type Owner Renter
Married81%19%
Male70.7%29.3%
All63.5%36.5%
Non Family52.6%47.4%
Female25.4%74.6%

63.5%

Rate of Home Ownership

Spencer Households and Families

Type Count Average Size Owned
All5,0012.1463.5
Married2,2632.8181
Non Family1,9841.1252.6
Female5152.9425.4
Male2392.6870.7

2.77

Average Family Size

2.14

Average Household Size

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Spencer Households by Type

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Education Attained Count Percentage
Less Than 9th Grade540.69%
9th to 12th Grade3113.98%
High School Graduate2,84736.42%
Some College2,11927.10%
Associates Degree7449.52%
Bachelors Degree1,26416.17%
Graduate Degree4796.13%
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Spencer Educational Attainment by Sex (over 25)

Spencer Educational Attainment by Race

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Race Total High School Bachelors
White7,4677,1201,706
2+ Races133133
Hispanic9880
Asian989837
Other Race3636
Black1616

The highest rate of high school graduation is among black people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 37.76%.

Spencer Educational Attainment by Race

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Name Average Male Female
Overall$37,220$43,365$28,998
Less Than 9th Grade$30,026$31,020$19,776
High School Graduate$24,583$33,417$16,339
Some College$39,464$47,305$31,447
Bachelors Degree$38,636$47,401$31,875
Graduate Degree$54,554$$41,518

$37,220

Average Earnings

$43,365

Average Male

$28,998

Average Female

Spencer Earnings by Educational Attainment

Spencer Language by Age

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Spencer Language

96.82% of Spencer residents speak only English, while 3.18% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.84% of the population.

Spencer Language

Spencer Poverty by Race

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Name Total In Poverty Poverty Rate
White10,0111,20612.05%
Hispanic3107022.58%
Multiple2844616.20%

12.11%

Overall Poverty Rate

7.75%

Male Poverty Rate

16.14%

Female Poverty Rate

Poverty in Spencer

The race most likely to be in poverty in Spencer is Hispanic, with 22.58% below the poverty level.

The race least likely to be in poverty in Spencer is White, with 12.05% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.97%. Among those working part-time, it was 15.00%, and for those that did not work, the poverty rate was 11.61%.

Spencer Poverty

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Name Poverty
Less Than 9th Grade14.04%
High School9.04%
Some College8.96%
Bachelors or Greater2.25%

Spencer Poverty Rate by Education

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Rate Poverty
Female Unemployed36.07%
Female Employed9.71%
Male Employed3.09%
Male Unemployed0.00%

Spencer Poverty Rate by Employment Status and Sex

Spencer Income by Household Type

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Name Median Mean
Households$46,545$61,108
Families$64,298$75,274
Married Families$74,572-
Non Families$26,516$37,229
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Income by Household Type

Spencer Marital Status

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Marriage Rates

53.3%

Overall Marriage Rate

54.7%

Male Marriage Rate

52.1%

Female Marriage Rate

Spencer Married by Age and Sex

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Spencer Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.

Spencer Marital Status by Race

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Spencer Marital Status

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767

Number of Veterans

705

Male Veterans

62

Female Veterans

War Veterans
Vietnam293
Korea93
First Gulf War93
Second Gulf War66
World War II22

Spencer Veterans by War

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Age Group Veterans
65 to 74239
75+235
55 to 64139
35 to 54135
18 to 3419

Spencer Veterans by Age

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Spencer Veterans by Race

Spencer Veterans by Education

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5.64%

Veteran Poverty Rate

23.62%

Veteran Disability Rate

Spencer Veterans by Education

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62%

Labor Force Participation

58.9%

Employment Rate

5%

Unemployment Rate

Spencer Employment by Age

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Spencer Employment by Race

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Spencer Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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69.78%

Born in Spencer

97.99%

Native Born

2.01%

Foreign Born

1.08%

Non Citizen

0.93%

Naturalized

Place of Birth

97.99% of Spencer residents were born in the United States, with 69.78% having been born in Iowa. 1.08% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Spencer Place of Birth

Year Population Growth Annual Growth Rate
202110,834-59-0.54%
202010,893-59-0.54%
201910,952-59-0.54%
201811,011-21-0.19%
201711,032-62-0.56%
201611,094-105-0.94%
201511,199190.17%
201411,180500.45%
201311,130-34-0.30%
201211,164-39-0.35%
201111,203-22-0.20%
201011,225-92-0.08%
200011,3172510.22%
199011,066-660-0.58%
198011,7261,4481.33%
197010,2781,4141.49%
19608,8641,4181.76%
19507,4468471.21%
19406,5991,5802.77%
19305,0194200.88%
19204,5991,5944.35%
19103,005-90-0.29%
19003,0950.00%

Spencer Population by Year