Jefferson, Iowa Population 2021

4,020
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Jefferson is a city located in Greene County Iowa. It is also the county seat of Greene County. With a 2020 population of 4,020, it is the 99th largest city in Iowa and the 5398th largest city in the United States . Jefferson is currently declining at a rate of -1.01% annually and its population has decreased by -7.48% since the most recent census, which recorded a population of 4,345 in 2010. Jefferson reached it's highest population of in . Spanning over 6 miles, Jefferson has a population density of 674 people per square mile.

The average household income in Jefferson is $61,684 with a poverty rate of 7.24%. The median rental costs in recent years comes to $648 per month, and the median house value is $94,100. The median age in Jefferson is 43.5 years, 38.1 years for males, and 47.3 years for females.

Jefferson Demographics

According to the most recent ACS, the racial composition of Jeffersonwas:

  • White: 95.09%
  • Two or more races: 2.49%
  • Other race: 1.21%
  • Asian: 0.53%
  • Black or African American: 0.36%
  • Native American: 0.31%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Jefferson, Iowa is 4,020 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 4,102.The last official US Census in 2010 recorded the population at 4,345.

Jefferson, Iowa Population 2021

Population by Race

Race Population Percentage
White3,93495.09%
Two or More Races1032.49%
Some Other Race501.21%
Asian220.53%
Black or African American150.36%
American Indian and Alaska Native130.31%
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Jefferson Population by Race

Jefferson Population Pyramid $2021

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Jefferson Median Age

43.5


Total

38.1


Male

47.3


Female

Jefferson Adults

There are 3,184 adults, (1,088 of whom are seniors) in Jefferson.

Jefferson Age Dependency

97.4

Age Dependency Ratio

51.9

Old Age Dependency Ratio

45.5

Child Dependency Ratio

Jefferson Sex Ratio

Female

2,204

53.28%

Male

1,933

46.72%

Jefferson Population by Age

Jefferson Renter vs Owner Occupied by Household Type

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Jefferson Household Types

Type Owner Renter
Male10.2%89.8%
Non Family50.9%49.1%
Female52.2%47.8%
All65.8%34.2%
Married88.4%11.6%

65.8%

Rate of Home Ownership

Jefferson Households and Families

Type Count Average Size Owned
All1,8772.1365.8
Non Family8251.1850.9
Married7942.9388.4
Female2092.4552.2
Male493.9210.2

2.8

Average Family Size

2.13

Average Household Size

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Jefferson Households by Type

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Education Attained Count Percentage
Less Than 9th Grade612.14%
9th to 12th Grade1515.29%
High School Graduate1,11238.92%
Some College62321.81%
Associates Degree30510.68%
Bachelors Degree36512.78%
Graduate Degree2408.40%
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Jefferson Educational Attainment by Sex (over 25)

Jefferson Educational Attainment by Race

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Race Total High School Bachelors
White2,7162,576570
Hispanic9321
2+ Races2525
Asian222222
Other Race20
Black146
Native American131313

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

The highest rate of bachelors degrees is among native american people with a rate of 100.00%.

Jefferson Educational Attainment by Race

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Name Average Male Female
Overall$32,423$45,290$25,295
Less Than 9th Grade$10,074$$8,984
High School Graduate$25,871$33,269$21,071
Some College$41,500$52,426$28,021
Bachelors Degree$43,523$36,645$45,000
Graduate Degree$51,375$$47,750

$32,423

Average Earnings

$45,290

Average Male

$25,295

Average Female

Jefferson Earnings by Educational Attainment

Jefferson Language by Age

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Jefferson Language

93.80% of Jefferson residents speak only English, while 6.20% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.11% of the population.

Jefferson Language

Jefferson Poverty by Race

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Name Total In Poverty Poverty Rate
White3,7682697.14%
Hispanic198147.07%
Other501428.00%
Multiple10398.74%

7.24%

Overall Poverty Rate

3.64%

Male Poverty Rate

10.44%

Female Poverty Rate

Poverty in Jefferson

The race most likely to be in poverty in Jefferson is Other, with 28.00% below the poverty level.

The race least likely to be in poverty in Jefferson is Hispanic, with 7.07% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.36%. Among those working part-time, it was 10.97%, and for those that did not work, the poverty rate was 14.81%.

Jefferson Poverty

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Name Poverty
Less Than 9th Grade12.50%
High School10.65%
Some College7.76%
Bachelors or Greater4.55%

Jefferson Poverty Rate by Education

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Rate Poverty
Female Unemployed47.73%
Female Employed5.20%
Male Employed0.97%
Male Unemployed0.00%

Jefferson Poverty Rate by Employment Status and Sex

Jefferson Income by Household Type

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Name Median Mean
Households$46,008$61,684
Families$69,552$79,490
Married Families$85,405-
Non Families$30,798$34,404
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Income by Household Type

Jefferson Marital Status

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Marriage Rates

47.4%

Overall Marriage Rate

52.9%

Male Marriage Rate

42.7%

Female Marriage Rate

Jefferson Married by Age and Sex

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Jefferson 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 45-54.

Jefferson Marital Status by Race

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Jefferson Marital Status

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240

Number of Veterans

232

Male Veterans

8

Female Veterans

War Veterans
Vietnam72
First Gulf War48
Korea43
World War II42
Second Gulf War9

Jefferson Veterans by War

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Age Group Veterans
75+102
65 to 7458
55 to 6442
35 to 5429
18 to 349

Jefferson Veterans by Age

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Jefferson Veterans by Race

Jefferson Veterans by Education

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2.62%

Veteran Poverty Rate

31.88%

Veteran Disability Rate

Jefferson Veterans by Education

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62.4%

Labor Force Participation

60.4%

Employment Rate

3.2%

Unemployment Rate

Jefferson Employment by Age

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Jefferson Employment by Race

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Jefferson 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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80.40%

Born in Jefferson

97.82%

Native Born

2.18%

Foreign Born

0.63%

Non Citizen

1.55%

Naturalized

Place of Birth

97.82% of Jefferson residents were born in the United States, with 80.40% having been born in Iowa. 0.63% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Jefferson Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
20214,020-41-1.01%
20204,061-41-1.00%
20194,102-41-0.99%
20184,14310.02%
20174,142-20-0.48%
20164,162260.63%
20154,136-83-1.97%
20144,219-41-0.96%
20134,260-13-0.30%
20124,273-72-1.66%
20114,345-10-0.23%
20104,355-271-0.60%
20004,6263340.75%
19904,292-562-1.22%
19804,8541190.25%
19704,7351650.36%
19604,5702440.55%
19504,3262380.57%
19404,0886571.77%
19303,431150.04%
19203,4168151.37%
19002,6010.00%

Jefferson Population by Year