Jefferson County, Kansas Population 2020

Jefferson County, Kansas's estimated population is 18,945 with a growth rate of -0.08% in the past year according to the most recent United States census data. Jefferson County, Kansas is the 29th largest county in Kansas.

Year Population Growth Growth Rate
202018,945-15-0.08%
201918,960-15-0.08%
201818,975-15-0.08%
201718,9901480.79%
201618,842290.15%
201518,813-9-0.05%
201418,822320.17%
201318,790-88-0.47%
201218,878-80-0.42%
201118,958-180-0.94%
201019,1383,23320.33%
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%
192014,750-1,076-6.80%
191015,826-1,707-9.74%
190017,5339135.49%
189016,6201,0576.79%
188015,5633,03724.25%
187012,5268,067180.92%
18604,4590.00%
2020 Growth Rate
-0.08%
County Website
State
Founded
August 25, 1855
County Seat

Jefferson County, Kansas Population Growth

Population by Race

Race Population Percentage
White18,04895.55%
Two or More Races5082.69%
American Indian and Alaska Native1290.68%
Black or African American1280.68%
Some Other Race730.39%
Asian20.01%

Jefferson County, Kansas Population Pyramid 2020

Jefferson County, Kansas Median Age

44.2


Total

43.1


Male

45


Female

Jefferson County, Kansas Adults

There are 14,501 adults, (3,434 of whom are seniors) in Jefferson County, Kansas.

Jefferson County, Kansas Age Dependency

70.7

Age Dependency Ratio

31

Old Age Dependency Ratio

39.6

Child Dependency Ratio

Jefferson County, Kansas Sex Ratio

Female

9,307

49.27%

Male

9,581

50.73%

Jefferson County, Kansas Households and Families

Jefferson County, Kansas Renter vs Owner Occupied by Household Type

Jefferson County, Kansas Household Types

Type Owner Renter
Married88.7%11.3%
All82%18%
Male77.8%22.2%
Non Family75.6%24.4%
Female52.5%47.5%

82.0%

Rate of Home Ownership

Type Count Average Size Owned
All7,6002.4582
Married4,6212.9788.7
Non Family2,1481.2275.6
Female5472.752.5
Male2842.8777.8

2.89

Average Family Size

2.45

Average Household Size

5.5%

Unmarried (Opposite Sex)

0.1%

Unmarried (Same Sex)

Jefferson County, Kansas Education

Education Attained Count Percentage
Less Than 9th Grade2371.79%
9th to 12th Grade6214.69%
High School Graduate5,35040.44%
Some College3,27824.78%
Associates Degree8436.37%
Bachelors Degree2,03915.41%
Graduate Degree8606.50%

Jefferson County, Kansas Educational Attainment by Race

Name Total High School Bachelors
White12,48611,6822,762
Hispanic29126749
Multiple Races27626040
Black11710817
Native American1049926
Other Race583914
Asian22

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

The highest rate of bachelors degrees is among native american people with a rate of 25.00%.

Name Average Male Female
Overall$41,937$47,552$35,474
Less Than High School$30,385$32,218$20,750
High School Grad$41,652$48,559$28,974
Some College$39,327$46,800$33,827
Bachelors Degree$44,021$43,986$44,057
Graduate Degree$54,575$75,402$53,972

$41,937

Average Earnings

$47,552

Average Male

$35,474

Average Female

Jefferson County, Kansas Language

Jefferson County, Kansas Language by Age

Jefferson County, Kansas Language

98.57% of Jefferson County, Kansas residents speak only English, while 1.43% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 0.67% of the population.

Jefferson County, Kansas Poverty

Jefferson County, Kansas Poverty by Race

Name Total In Poverty Poverty Rate
White17,4781,2587.20%
Hispanic48112926.82%
Multiple4776112.79%
Native1293426.36%
Black861618.60%

7.99%

Overall Poverty Rate

7.76%

Male Poverty Rate

8.21%

Female Poverty Rate

Poverty in Jefferson County, Kansas

The race most likely to be in poverty in Jefferson County, Kansas is Hispanic, with 26.82% below the poverty level.

The race least likely to be in poverty in Jefferson County, Kansas is White, with 7.20% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.92%. Among those working part-time, it was 11.23%, and for those that did not work, the poverty rate was 11.44%.

Name Poverty
Less Than High School15.73%
High School7.78%
Some College5.77%
Bachelors or Greater2.24%
Name Poverty
Male Unemployed17.99%
Female Unemployed9.45%
Female Employed3.95%
Male Employed3.12%

Jefferson County, Kansas Income

Jefferson County, Kansas Income by Household Type

Name Median Mean
Households$61,793$72,391
Families$75,237$82,792
Married Families$82,116-
Non Families$32,950$41,773

Jefferson County, Kansas Marital Status

Jefferson County, Kansas Marital Status

Marriage Rates

62.1%

Overall Marriage Rate

62.7%

Male Marriage Rate

61.4%

Female Marriage Rate

Jefferson County, Kansas Married by Age and Sex

Jefferson County, Kansas Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.

Jefferson County, Kansas Marital Status by Race

Jefferson County, Kansas Veterans

1,481

Number of Veterans

1,409

Male Veterans

72

Female Veterans

War Veterans
Vietnam752
First Gulf War232
Second Gulf War144
Korea116
World War II39
Age Group Veterans
65 to 74501
55 to 64384
75+333
35 to 54216
18 to 3447
Name Veterans % of Total
White1,41210.15%
2 or More309.80%
Black2724.11%
Hispanic206.31%
Indian87.69%
Other46.90%

$Jefferson County, Kansas Veterans by Education

5.60%

Veteran Poverty Rate

32.46%

Veteran Disability Rate

Jefferson County, Kansas Employment Status

65.1%

Labor Force Participation

61.5%

Employment Rate

5.5%

Unemployment Rate

Jefferson County, Kansas Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

75.15%

Born in Kansas

99.33%

Native Born

0.67%

Foreign Born

0.30%

Non Citizen

Place of Birth

99.33% of Jefferson County, Kansas residents were born in the United States, with 75.15% having been born in Kansas. 0.30% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990