Counties in Kentucky by median age on 1 July (US county estimates)

Lyon County had the highest median age on 1 July (US county estimates) of 120 counties in 2021, at 50.3 years. Christian County had the lowest, at 29.5 years. The median was 41.8 years. Source: the U.S. Census Bureau.

Highest50.3Lyon County

Lowest29.5Christian County

Median41.8120 counties

Top 40 counties, 2021

years. Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.

Full ranking

Rank	Counties	2021 years	Change on 2020
1	Lyon County	50.3	+0.8
2	Hickman County	49.3	+0.2
3	Trigg County	46.9	-0.1
4	Livingston County	46.6	-0.8
5	Robertson County	46.5	-1.3
6	Cumberland County	46	-1.1
7	Marshall County	45.9	0
8	Ballard County	45.2	+0.1
9	Estill County	44.2	0
9	Green County	44.2	-0.7
9	Menifee County	44.2	-1.2
9	Owsley County	44.2	-0.4
13	Crittenden County	44	+0.3
13	Greenup County	44	+0.1
13	Rockcastle County	44	-0.2
16	Pike County	43.9	+0.3
17	Caldwell County	43.8	-0.2
18	Trimble County	43.7	-0.4
19	Knott County	43.6	0
19	Leslie County	43.6	0
21	Edmonson County	43.5	0
21	Letcher County	43.5	0
21	Magoffin County	43.5	+0.1
24	Carlisle County	43.4	-0.4
24	McLean County	43.4	-0.6
24	Russell County	43.4	-0.2
24	Wayne County	43.4	+0.1
28	Clinton County	43.1	-0.3
28	Fulton County	43.1	-0.2
28	Mercer County	43.1	-0.3
28	Woodford County	43.1	+0.1
32	Garrard County	43	-0.3
33	Floyd County	42.9	+0.1
33	Johnson County	42.9	0
35	Boyd County	42.8	0
35	Breckinridge County	42.8	0
35	Carter County	42.8	+0.2
35	Pulaski County	42.8	0
39	Breathitt County	42.7	+0.2
40	Harrison County	42.5	-0.3
40	Lee County	42.5	-0.6
42	Elliott County	42.4	0
42	McCracken County	42.4	0
42	Owen County	42.4	+0.2
45	Bourbon County	42.3	+0.2
45	Monroe County	42.3	+0.1
45	Muhlenberg County	42.3	+0.3
45	Washington County	42.3	-0.3
49	Anderson County	42.2	0
49	Mason County	42.2	+0.1
51	Henry County	42.1	+0.1
51	Perry County	42.1	+0.1
53	Bracken County	42	+0.1
53	Harlan County	42	-0.1
53	Lewis County	42	0
53	Pendleton County	42	+0.1
57	Jackson County	41.9	-0.1
57	Lawrence County	41.9	0
57	Lincoln County	41.9	-0.4
57	Spencer County	41.9	-0.1
61	Hancock County	41.8	+0.2
61	Hopkins County	41.8	-0.1
63	Metcalfe County	41.7	-0.3
64	Bell County	41.6	-0.5
64	Grayson County	41.6	+0.3
64	Wolfe County	41.6	0
67	Clark County	41.5	+0.1
67	Morgan County	41.5	+0.2
67	Union County	41.5	+1
67	Webster County	41.5	0
71	Casey County	41.4	-0.1
71	Larue County	41.4	-0.2
71	Nicholas County	41.4	-0.8
74	Butler County	41.3	-0.2
74	Franklin County	41.3	+0.1
74	Henderson County	41.3	0
77	Fleming County	41.2	-0.3
78	Allen County	41.1	0
79	Bullitt County	40.9	+0.3
79	Ohio County	40.9	0
81	Barren County	40.8	0
81	Boyle County	40.8	0
81	Clay County	40.8	+0.1
81	Nelson County	40.8	+0.1
85	Adair County	40.7	+0.2
85	Marion County	40.7	+0.2
87	Knox County	40.6	0
88	Graves County	40.4	-0.1
88	Martin County	40.4	0
88	Powell County	40.4	-0.1
91	Laurel County	40.3	+0.1
92	Logan County	40.2	-0.3
92	Oldham County	40.2	+0.1
94	Montgomery County	40.1	+0.1
94	Simpson County	40.1	+0.4
96	McCreary County	40	-0.3
97	Hart County	39.9	-0.1
98	Bath County	39.8	0
99	Shelby County	39.7	+0.3
100	Daviess County	39	+0.2
101	Campbell County	38.9	+0.4
101	Meade County	38.9	-0.1
103	Gallatin County	38.8	-0.5
103	Jefferson County	38.8	+0.1
103	Taylor County	38.8	-0.2
106	Carroll County	38.4	+0.1
107	Jessamine County	38.2	+0.1
108	Hardin County	37.9	-0.2
109	Boone County	37.8	+0.2
110	Kenton County	37.7	+0.1
111	Todd County	37.6	-0.1
112	Grant County	37.5	-0.2
112	Whitley County	37.5	-0.1
114	Scott County	36.3	+0.1
115	Calloway County	36.2	-0.5
116	Madison County	35.7	+0.2
117	Fayette County	35.5	+0.3
118	Warren County	33.9	+0.1
119	Rowan County	32.9	+0.5
120	Christian County	29.5	-0.3

Other periods

About this ranking

Age that divides the resident population of a US county into two halves of equal size on 1 July, from Census Bureau population estimates calculated by single year of age.

Counties only: the county file has no state or national medians, and medians cannot be added up. A single-year estimate, unlike median_age, which for US places is a five-year American Community Survey estimate.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage (Counties in Kentucky by median age on 1 July (US county estimates), 2021) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Kentucky by median age on 1 July (US county estimates), 2021. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/kentucky-counties?period=2021. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Counties in Kentucky by median age on 1 July (US county estimates), 2021. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/kentucky-counties?period=2021.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage, Counties in Kentucky by median age on 1 July (US county estimates), 2021 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/median-age-july-1-us-counties/kentucky-counties?period=2021 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_kentucky_by_2021,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Kentucky by median age on 1 July (US county estimates), 2021}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/kentucky-counties?period=2021. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN\_AGE\_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}

RIS

TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage: Counties in Kentucky by median age on 1 July (US county estimates), 2021
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/median-age-july-1-us-counties/kentucky-counties?period=2021
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/kentucky-counties?period=2021.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -

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Questions

Which county has the highest median age on 1 July (US county estimates)?

Lyon County, with 50.3 years in 2021, according to the U.S. Census Bureau.

Which county has the lowest median age on 1 July (US county estimates)?

Christian County, with 29.5 years in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: median age (MEDIAN_AGE_TOT) on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage. Retrieved 2026-10-12.