Data / Rankings / Median age on 1 July (US county estimates) / US counties

US counties by median age on 1 July (US county estimates)

Sumter County had the highest median age on 1 July (US county estimates) of 3144 counties in 2024, at 68.3 years. Lexington city had the lowest, at 22.3 years. The median was 42.1 years. Source: the U.S. Census Bureau.

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Highest68.3Sumter County
Lowest22.3Lexington city
Median42.13144 counties

Map of counties, 2024

years, 2024. 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. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2024

Sumter County: 68.3 yearsSumter County68.3Kalawao County: 64.8 yearsKalawao County64.8Catron County: 62.8 yearsCatron County62.8McCormick County: 62.3 yearsMcCormick County62.3Jeff Davis County: 61.6 yearsJeff Davis County61.6Jefferson County: 61.4 yearsJefferson County61.4Charlotte County: 60.3 yearsCharlotte County60.3Northumberland County: 60.1 yearsNorthumberland County60.1Highland County: 60 yearsHighland County60Lancaster County: 60 yearsLancaster County60Ontonagon County: 59.8 yearsOntonagon County59.8Towns County: 59.4 yearsTowns County59.4Harding County: 59.2 yearsHarding County59.2Curry County: 59.1 yearsCurry County59.1Alcona County: 58.9 yearsAlcona County58.9Hamilton County: 58.7 yearsHamilton County58.7Vilas County: 58.4 yearsVilas County58.4Florence County: 58.3 yearsFlorence County58.3Wheeler County: 58.2 yearsWheeler County58.2Citrus County: 57.8 yearsCitrus County57.8Sarasota County: 57.8 yearsSarasota County57.8Roscommon County: 57.7 yearsRoscommon County57.7Brunswick County: 57.5 yearsBrunswick County57.5Iron County: 57.5 yearsIron County57.5Keweenaw County: 57.5 yearsKeweenaw County57.5Sierra County: 57.5 yearsSierra County57.5Aitkin County: 57.3 yearsAitkin County57.3Custer County: 57.3 yearsCuster County57.3Clay County: 57.2 yearsClay County57.2Hinsdale County: 57.2 yearsHinsdale County57.2Burnett County: 56.9 yearsBurnett County56.9Llano County: 56.9 yearsLlano County56.9San Juan County: 56.9 yearsSan Juan County56.9Montmorency County: 56.8 yearsMontmorency County56.8Union County: 56.8 yearsUnion County56.8Custer County: 56.7 yearsCuster County56.7Barnstable County: 56.6 yearsBarnstable County56.6Huerfano County: 56.6 yearsHuerfano County56.6Carroll County: 56.3 yearsCarroll County56.3Fall River County: 56.3 yearsFall River County56.3Sumter County: 68.3 yearsSumter County68.3Kalawao County: 64.8 yearsKalawao County64.8Catron County: 62.8 yearsCatron County62.8McCormick County: 62.3 yearsMcCormick County62.3Jeff Davis County: 61.6 yearsJeff Davis County61.6Jefferson County: 61.4 yearsJefferson County61.4Charlotte County: 60.3 yearsCharlotte County60.3Northumberland County: 60.1 yearsNorthumberland County60.1Highland County: 60 yearsHighland County60Lancaster County: 60 yearsLancaster County60Ontonagon County: 59.8 yearsOntonagon County59.8Towns County: 59.4 yearsTowns County59.4Harding County: 59.2 yearsHarding County59.2Curry County: 59.1 yearsCurry County59.1Alcona County: 58.9 yearsAlcona County58.9Hamilton County: 58.7 yearsHamilton County58.7Vilas County: 58.4 yearsVilas County58.4Florence County: 58.3 yearsFlorence County58.3Wheeler County: 58.2 yearsWheeler County58.2Citrus County: 57.8 yearsCitrus County57.8Sarasota County: 57.8 yearsSarasota County57.8Roscommon County: 57.7 yearsRoscommon County57.7Brunswick County: 57.5 yearsBrunswick County57.5Iron County: 57.5 yearsIron County57.5Keweenaw County: 57.5 yearsKeweenaw County57.5Sierra County: 57.5 yearsSierra County57.5Aitkin County: 57.3 yearsAitkin County57.3Custer County: 57.3 yearsCuster County57.3Clay County: 57.2 yearsClay County57.2Hinsdale County: 57.2 yearsHinsdale County57.2Burnett County: 56.9 yearsBurnett County56.9Llano County: 56.9 yearsLlano County56.9San Juan County: 56.9 yearsSan Juan County56.9Montmorency County: 56.8 yearsMontmorency County56.8Union County: 56.8 yearsUnion County56.8Custer County: 56.7 yearsCuster County56.7Barnstable County: 56.6 yearsBarnstable County56.6Huerfano County: 56.6 yearsHuerfano County56.6Carroll County: 56.3 yearsCarroll County56.3Fall River County: 56.3 yearsFall River County56.3
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

RankCounties2024
years		Change on 2023
1Sumter County68.3+0.2
2Kalawao County64.8+0.7
3Catron County62.8+0.6
4McCormick County62.3+0.5
5Jeff Davis County61.6+0.3
6Jefferson County61.4+0.3
7Charlotte County60.3-0.1
8Northumberland County60.1+0.5
9Highland County60+0.5
9Lancaster County60+0.1
11Ontonagon County59.8+0.3
12Towns County59.4+0.4
13Harding County59.2+0.6
14Curry County59.1+0.5
15Alcona County58.90
16Hamilton County58.7+0.2
17Vilas County58.4+0.4
18Florence County58.3+0.5
19Wheeler County58.2-0.6
20Citrus County57.8-0.1
20Sarasota County57.8+0.1
22Roscommon County57.7+0.4
23Brunswick County57.5+0.1
23Iron County57.5+0.3
23Keweenaw County57.5+0.4
23Sierra County57.5+0.3
27Aitkin County57.30
27Custer County57.3+0.5
29Clay County57.2+0.1
29Hinsdale County57.2+0.6
31Burnett County56.9+0.4
31Llano County56.9-0.5
31San Juan County56.9+0.4
34Montmorency County56.8+0.1
34Union County56.8+0.2
36Custer County56.7+0.2
37Barnstable County56.6+0.2
37Huerfano County56.6+0.6
39Carroll County56.3+0.4
39Fall River County56.3+0.7
39Leelanau County56.3+0.5
42Petroleum County56.2+0.8
43Douglas County56.1+0.4
43Indian River County56.1+0.2
43Presque Isle County56.1-0.1
46Mineral County55.9+0.1
46Yavapai County55.90
48Door County55.8+0.2
49Adams County55.7+0.8
49Middlesex County55.7+0.1
51Bayfield County55.6+0.4
51Pamlico County55.6-0.3
53Quitman County55.5+0.6
54Ouray County55.4+0.8
55La Paz County55.3+0.2
55Sullivan County55.3+0.4
57Mathews County55.10
57Sierra County55.1+0.7
59Mora County54.8+0.4
59Prairie County54.8+0.8
59Real County54.8+0.9
62Cherokee County54.5+0.2
62Cumberland County54.5+0.3
62Polk County54.5+0.3
62Sanders County54.5+0.1
66Charles City County54.4+0.6
66Greene County54.4+0.7
66Kent County54.4+1.7
66Pacific County54.40
70Boyd County54.3-0.7
70Cook County54.3+0.5
70Garden County54.3+0.6
70Hickory County54.3-0.4
70Highlands County54.3-0.1
70Mohave County54.3+0.2
70Oneida County54.3+0.3
77Pope County54.20
77Sabine County54.2+0.2
77Stone County54.2+0.3
80Flagler County54.10
80Sawyer County54.1+0.1
82Fannin County54+0.2
82Georgetown County54+0.3
82Storey County54+0.5
82Wahkiakum County54+0.2
82Washburn County54+0.4
87Esmeralda County53.9+0.7
87Lincoln County53.9+0.2
87Northampton County53.9+0.3
90Benton County53.8+0.2
90Iosco County53.80
90Lincoln County53.80
90Price County53.8+0.1
94Schoolcraft County53.7+0.3
95Boise County53.6+0.6
95Clallam County53.60
95Mason County53.6-0.3
98Cape May County53.5+0.5
98Iron County53.5+0.2
98Martin County53.5-0.1
101Collier County53.4+0.1
101Mackinac County53.40
103Oscoda County53.3-0.1
103Rappahannock County53.3+0.1
105Slope County53.2+1.6
106Menard County53.1+0.3
106Plumas County53.1-0.1
108Adams County53-0.3
108Bandera County53+0.2
108Blanco County53+0.2
108Franklin County53-0.2
108Nelson County53+0.1
108Potter County530
114Marion County52.90
114Nye County52.9+0.1
116Foard County52.8+1.2
116Kimble County52.8+1
116Lincoln County52.8+0.2
116Northampton County52.8+0.3
116Sussex County52.8+0.2
121Camden County52.7+0.2
121Marion County52.7+0.3
123Gillespie County52.5-0.2
123Grant County52.50
125Antrim County52.4+0.2
125Deuel County52.4+0.7
125Lemhi County52.4+0.2
125Lincoln County52.4-0.2
129Custer County52.30
129Lake County52.30
131Nelson County52.2-0.9
132Baxter County52.10
132Brown County52.1+0.4
132Cameron County52.1+0.3
132Pendleton County52.1+0.1
132Pickett County52.1+0.3
137Alleghany County52+0.2
137Benzie County52+0.3
137Gila County52-0.2
137Teller County52+0.1
141Archuleta County51.9-0.3
141Taos County51.9+0.5
143Carteret County51.8+0.1
143Clearwater County51.8-0.1
143Edwards County51.80
143Newton County51.8+0.3
143Patrick County51.8+0.3
143Surry County51.8+0.1
149Aransas County51.7-0.1
149Columbia County51.7+0.3
149Essex County51.70
152Cheboygan County51.6+0.3
152Gogebic County51.6-0.1
152Macon County51.6+0.2
152Sheridan County51.6+0.2
152Stonewall County51.6-0.2
157Bath County51.5-0.5
157McIntosh County51.5+0.1
157Mineral County51.5-0.1
160Alpine County51.4+0.4
160Campbell County51.4-0.5
160Judith Basin County51.4-0.2
163Goochland County51.3+0.4
163Jo Daviess County51.30
163Ottawa County51.3+0.1
163Talbot County51.3-0.5
167Fairfield County51.20
167Ogemaw County51.2+0.1
167Piscataquis County51.2-0.1
170Dundy County51.1-0.6
171Charlevoix County510
171Costilla County51+0.1
171Gladwin County51+0.1
171Golden Valley County51+0.7
171Grand Isle County51-0.3
171Grant County51+0.4
171Lake of the Woods County51-0.3
171Loup County51-0.9
171McPherson County51+1.1
171Meagher County51+0.1
171Worcester County51+0.1
182Ashe County50.9+0.1
182Granite County50.9+0.2
182Henderson County50.9+0.1
182McPherson County50.9-0.4
182Tucker County50.9+0.1
187Dare County50.8+0.2
187Madison County50.8-0.6
187Rabun County50.8+0.3
190Arenac County50.7+0.3
190Coos County50.7-0.2
190Dukes County50.7+0.1
190Grant County50.7-0.1
190Koochiching County50.7+0.1
190Lake County50.7-0.1
190Manistee County50.7+0.2
190Montgomery County50.7+0.2
198Amador County50.6-0.3
198Cass County50.6+0.1
198Crawford County50.6-0.4
198Elk County50.6+0.5
198Hardin County50.6-0.5
198Marquette County50.6+0.3
198McIntosh County50.6+0.1
198Talbot County50.6-0.2
198Wells County50.6-1
198Westmoreland County50.6-0.1
208Deer Lodge County50.5+0.1
208Dickens County50.5+0.4
208Horry County50.5+0.2
208Idaho County50.50
208Transylvania County50.5-0.3
208Van Buren County50.5+0.1
208Waushara County50.5+0.1
215Adams County50.4-0.8
215Belknap County50.4+0.1
215Calaveras County50.4-0.1
215Cleburne County50.4-0.1
215Gilmer County50.40
215Jewell County50.40
215Knox County50.4+0.1
215Loudon County50.4-0.1
223Emmons County50.3-0.3
223Perquimans County50.3-0.3
223Twiggs County50.3-0.5
223Wallowa County50.3-0.5
227Alleghany County50.20
227Jackson County50.2+1
227Kerr County50.20
227Pend Oreille County50.20
231Columbia County50.1+0.1
231Coosa County50.1+0.2
231De Baca County50.1-0.1
231Huron County50.1+0.1
231Mills County50.1-0.6
231Monroe County50.10
231Webster County50.1+1.8
238Camas County50+0.8
238Carbon County50+0.4
238Hot Springs County50-0.3
238Langlade County500
238Ozark County50-0.7
238Pocahontas County500
238Washington County50-0.2
245Forest County49.9-0.1
245Menominee County49.9-0.1
247Alexander County49.8+0.8
247Beaufort County49.8+0.2
247Blaine County49.8-2.6
247Hyde County49.8+0.3

Showing the top 250 of 3144. The Excel download has every row.

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 (US counties by median age on 1 July (US county estimates), 2024) [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, US counties by median age on 1 July (US county estimates), 2024. 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/us-counties?period=2024. 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. US counties by median age on 1 July (US county estimates), 2024. 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/us-counties?period=2024.

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, US counties by median age on 1 July (US county estimates), 2024 [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/us-counties?period=2024 (Accessed: 12 October 2026).

BibTeX
@misc{census_us_counties_by_median_2024,
  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: US counties by median age on 1 July (US county estimates), 2024}},
  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/us-counties?period=2024. 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: US counties by median age on 1 July (US county estimates), 2024
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/us-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/us-counties?period=2024.
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)?

Sumter County, with 68.3 years in 2024, according to the U.S. Census Bureau.

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

Lexington city, with 22.3 years in 2024.

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.

Median age on 1 July (US county estimates): other rankings

US counties: more rankings