Jefferson County, Kentucky Population 2020

Jefferson County, Kentucky's estimated population is 770,797 with a growth rate of 0.02% in the past year according to the most recent United States census data. Jefferson County, Kentucky is the largest county in Kentucky.

Year Population Growth Growth Rate
2020770,7971400.02%
2019770,6571400.02%
2018770,5171400.02%
2017770,3772,6660.35%
2016767,7112,5190.33%
2015765,1923,2190.42%
2014761,9732,5470.34%
2013759,4267,5611.01%
2012751,8655,4530.73%
2011746,4124,3620.59%
2010742,05077,11311.60%
1990664,937-20,067-2.93%
1980685,004-10,051-1.45%
1970695,05584,10813.77%
1960610,947126,33226.07%
1950484,61599,22325.75%
1940385,39230,0428.45%
1930355,35068,98124.09%
1920286,36923,4498.92%
1910262,92030,37113.06%
1900232,54943,95123.30%
1890188,59842,58829.17%
1880146,01027,05722.75%
1870118,95329,54933.05%
186089,40429,57349.43%
185059,83123,48564.62%
184036,34612,36751.57%
183023,9793,21115.46%
182020,7687,36955.00%
181013,3994,64553.06%
18008,7543,98983.71%
17904,7650.00%
2020 Growth Rate
0.02%
County Website
Founded
1780
County Seat
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Jefferson County, Kentucky Population Growth

Population by Race

Race Population Percentage
White551,54071.89%
Black or African American164,68521.47%
Asian21,3192.78%
Two or More Races20,4172.66%
Some Other Race7,3810.96%
American Indian and Alaska Native1,4360.19%
Native Hawaiian and Other Pacific Islander3760.05%
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Jefferson County, Kentucky Population Pyramid 2020

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Jefferson County, Kentucky Median Age

38.1


Total

36.6


Male

39.8


Female

Jefferson County, Kentucky Adults

There are 594,943 adults, (117,584 of whom are seniors) in Jefferson County, Kentucky.

Jefferson County, Kentucky Age Dependency

60.7

Age Dependency Ratio

24.6

Old Age Dependency Ratio

36.1

Child Dependency Ratio

Jefferson County, Kentucky Sex Ratio

Female

396,310

51.66%

Male

370,844

48.34%

Jefferson County, Kentucky Households and Families

Jefferson County, Kentucky Renter vs Owner Occupied by Household Type

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Jefferson County, Kentucky Household Types

Type Owner Renter
Married82.3%17.7%
All61.7%38.3%
Male54.1%45.9%
Non Family48.3%51.7%
Female43.2%56.8%

61.7%

Rate of Home Ownership

Type Count Average Size Owned
All310,3182.4261.7
Married126,0643.1482.3
Non Family125,2251.2548.3
Female43,6223.3943.2
Male15,4073.2554.1

3.12

Average Family Size

2.42

Average Household Size

6.1%

Unmarried (Opposite Sex)

0.4%

Unmarried (Same Sex)

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Jefferson County, Kentucky Education

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Education Attained Count Percentage
Less Than 9th Grade16,9843.21%
9th to 12th Grade35,8576.79%
High School Graduate141,83426.84%
Some College118,69722.47%
Associates Degree42,1037.97%
Bachelors Degree101,21719.16%
Graduate Degree71,66813.56%
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Jefferson County, Kentucky Educational Attainment by Race

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Name Total High School Bachelors
White383,785352,045139,865
Black101,83588,76517,897
Hispanic21,92316,8785,740
Asian13,76111,4637,115
Multiple Races7,0396,3242,508
Other Race3,5252,559729
Native American964903189
Islander23317758

The highest rate of high school graduation is among native american people with a rate of 93.67%.

The highest rate of bachelors degrees is among asian people with a rate of 51.70%.

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Name Average Male Female
Overall$37,886$42,718$32,818
Less Than High School$21,347$25,765$16,999
High School Grad$29,011$32,282$24,352
Some College$35,089$40,675$30,606
Bachelors Degree$50,292$59,281$43,574
Graduate Degree$63,294$75,586$55,784

$37,886

Average Earnings

$42,718

Average Male

$32,818

Average Female

Jefferson County, Kentucky Language

Jefferson County, Kentucky Language by Age

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Jefferson County, Kentucky Language

90.77% of Jefferson County, Kentucky residents speak only English, while 9.23% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.07% of the population.

Jefferson County, Kentucky Poverty

Jefferson County, Kentucky Poverty by Race

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Name Total In Poverty Poverty Rate
White509,89649,1559.64%
Black160,92046,24128.74%
Hispanic39,2968,26421.03%
Multiple19,7644,25921.55%
Asian21,1553,19015.08%
Other6,9151,17516.99%
Native1,42439427.67%

14.78%

Overall Poverty Rate

13.41%

Male Poverty Rate

16.06%

Female Poverty Rate

Poverty in Jefferson County, Kentucky

The race most likely to be in poverty in Jefferson County, Kentucky is Black, with 28.74% below the poverty level.

The race least likely to be in poverty in Jefferson County, Kentucky is White, with 9.64% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.58%. Among those working part-time, it was 18.83%, and for those that did not work, the poverty rate was 23.14%.

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Name Poverty
Less Than High School29.19%
High School14.53%
Some College11.20%
Bachelors or Greater4.23%
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Name Poverty
Female Unemployed42.79%
Male Unemployed31.01%
Female Employed8.33%
Male Employed5.63%

Jefferson County, Kentucky Income

Jefferson County, Kentucky Income by Household Type

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Name Median Mean
Households$54,357$76,517
Families$70,412$94,258
Married Families$90,275$115,390
Non Families$35,113$47,545
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Jefferson County, Kentucky Marital Status

Jefferson County, Kentucky Marital Status

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Marriage Rates

43.7%

Overall Marriage Rate

45.9%

Male Marriage Rate

41.7%

Female Marriage Rate

Jefferson County, Kentucky Married by Age and Sex

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Jefferson County, Kentucky 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, Kentucky Marital Status by Race

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Jefferson County, Kentucky Veterans

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46,965

Number of Veterans

43,213

Male Veterans

3,752

Female Veterans

War Veterans
Vietnam16,661
First Gulf War8,672
Second Gulf War7,133
Korea3,954
World War II2,225
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Age Group Veterans
65 to 7412,001
35 to 5411,477
75+10,620
55 to 649,293
18 to 343,574
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Name Veterans % of Total
White35,4767.98%
Black10,3158.70%
Hispanic1,0574.08%
2 or More5655.87%
Asian2331.47%
Other1874.28%
Indian14112.27%
Hawaiian4816.78%

Jefferson County, Kentucky Veterans by Education

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8.08%

Veteran Poverty Rate

28.73%

Veteran Disability Rate

Jefferson County, Kentucky Employment Status

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65.9%

Labor Force Participation

62%

Employment Rate

5.9%

Unemployment Rate

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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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68.26%

Born in Kentucky

92.60%

Native Born

7.40%

Foreign Born

4.13%

Non Citizen

3.27%

Naturalized

Place of Birth

92.60% of Jefferson County, Kentucky residents were born in the United States, with 68.26% having been born in Kentucky. 4.13% 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