Jefferson County, Kansas Population 2024

18,194

Jefferson County, Kansas's estimated 2024 population is 18,194 with a growth rate of -0.41% in the past year according to the most recent United States census data. Jefferson County, Kansas is the 30th largest county in Kansas. The 2010 population was 19,120 and has seen a growth of -4.84% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202917,819-75-0.42%
202817,894-75-0.42%
202717,969-75-0.42%
202618,044-75-0.41%
202518,119-75-0.41%
202418,194-75-0.41%
202318,269-75-0.41%
202218,344-75-0.41%
202118,419990.54%
202018,320-845-4.41%
201919,1652641.4%
201818,901-34-0.18%
201718,935970.51%
201618,838490.26%
201518,789-9-0.05%
201418,798310.17%
201318,767-91-0.48%
201218,858-83-0.44%
201118,941-179-0.94%
201019,120
199015,9056984.59%
198015,2073,26227.31%
197011,9456936.16%
196011,2521681.52%
195011,084-1,634-12.85%
194012,718-1,411-9.99%
193014,129-621-4.21%
192014,750-1,076-6.8%
191015,826-1,707-9.74%
190017,5339135.49%
189016,6201,0576.79%
188015,5633,03724.25%
187012,5268,067180.92%
18604,459-13,360-74.98%
showing: 34 rows
2024 Growth Rate
-0.41% (-75)
County Website
Jefferson County
State
Kansas
County Seat
2020 Population
18,320
Area
533 mi²
Density
34 people/mi²
Growth Since 2020
-0.69% (-126)
Founded
August 25, 1855

Jefferson County, Kansas Population 2024

Population by Race

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Race
Population
Percentage (of total)
White17,24793.8%
Two or more races8034.37%
Black or African American1370.75%
Native American1000.54%
Other race560.3%
Asian440.24%
Native Hawaiian or Pacific Islander
showing: 7 rows

White

Two or more races

Black or African American

Native American

Other race

Asian

Native Hawaiian or Pacific Islander

Jefferson County, Kansas Population by Race

Jefferson County, Kansas Population Pyramid 2024

Jefferson County, Kansas Median Age

43.2

Total

42.7

Male

43.6

Female

Jefferson County, Kansas Adults

There are 14,266 adults, (3,500 of whom are seniors) in Jefferson County, Kansas.

Jefferson County, Kansas Age Dependency

70.8

Age Dependency Ratio

32.5

Old Age Dependency Ratio

38.3

Child Dependency Ratio

Jefferson County, Kansas Sex Ratio

Female9,08849.43%
Male9,29950.57%

Jefferson County, Kansas Population by Age

Jefferson County, Kansas Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All7,3162.488515
Married4,2623.0593.46.6
Non Family2,2831.2473.726.3
Female5373.0369.830.2
Male2343.0475.624.4
showing: 5 rows

3.01

Average Family Size

2.48

Average Household Size

85.0%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Jefferson County, Kansas Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Jefferson County, Kansas Educational Attainment by Sex (over 25)

Jefferson County, Kansas Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among asian people with a rate of 100%.

The highest rate of bachelors degrees is among asian people with a rate of 88.64%.

Jefferson County, Kansas Educational Attainment by Race

All

Male

Female

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$51,643

Average Earnings

$57,921

Average Male

$42,917

Average Female

Jefferson County, Kansas Earnings by Educational Attainment

Jefferson County, Kansas Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

Jefferson County, Kansas Language

98.39% of Jefferson County, Kansas residents speak only English, while 1.61% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 1.22% of the population.

Jefferson County, Kansas Language

Jefferson County, Kansas Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White16,7671,0116.03%
Multiple787455.72%
Native942223.4%
Hispanic591223.72%
Black136139.56%
showing: 5 rows

6.04%

Overall Poverty Rate

6.79%

Male Poverty Rate

5.26%

Female Poverty Rate

Poverty in Jefferson County, Kansas

The race most likely to be in poverty in Jefferson County, Kansas is Native, with 23.4% below the poverty level.

The race least likely to be in poverty in Jefferson County, Kansas is Hispanic, with 3.72% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.05%. Among those working part-time, it was 9.08%, and for those that did not work, the poverty rate was 11.29%.

Jefferson County, Kansas Poverty

rate

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Rate
Poverty
Less Than 9th Grade12.37%
High School6.65%
Some College4.75%
Bachelors or Greater1.11%
showing: 4 rows

Jefferson County, Kansas Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed9.56%
Male Unemployed6.93%
Male Employed4.76%
Female Employed1.63%
showing: 4 rows

Jefferson County, Kansas Poverty Rate by Employment Status and Sex

Jefferson County, Kansas Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

Jefferson County, Kansas Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

57.8%

Overall Marriage Rate

59.5%

Male Marriage Rate

56.0%

Female Marriage Rate

Jefferson County, Kansas Married by Age and Sex

male

female

Jefferson County, Kansas Marriage

The age group where males are most likely to be married is Over 65, while the female age group most likely to be married is 35-44.

Jefferson County, Kansas Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

Jefferson County, Kansas Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,240

Number of Veterans

1,212

Male Veterans

28

Female Veterans

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Jefferson County, Kansas Veterans by War

count

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Jefferson County, Kansas Veterans by Age

count

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Jefferson County, Kansas Veterans by Race

Jefferson County, Kansas Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

3.46%

Veteran Poverty Rate

34.24%

Veteran Disability Rate

Jefferson County, Kansas Veterans by Education

LaborForceParticipation

64.4%

Labor Force Participation

62.1%

Employment Rate

3.5%

Unemployment Rate

Jefferson County, Kansas Employment by Age

LaborForceParticipation

Jefferson County, Kansas Employment by Race

LaborForceParticipation

Jefferson County, Kansas Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

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

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

77.08%

Born in Jefferson County, Kansas

99.11%

Native Born

0.89%

Foreign Born

0.53%

Non Citizen

0.36%

Naturalized

Place of Birth

99.11% of Jefferson County, Kansas residents were born in the United States, with 77.08% having been born in Kansas. 0.53% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Jefferson County, Kansas Place of Birth

Sources