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 2020, at 68.6 years. Lexington city had the lowest, at 22.5 years. The median was 42.1 years. Source: the U.S. Census Bureau.

Keep it in a collection in your library.
Highest68.6Sumter County
Lowest22.5Lexington city
Median42.13144 counties

Map of counties, 2020

years, 2020. 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, 2020

Sumter County: 68.6 yearsSumter County68.6Catron County: 62 yearsCatron County62Charlotte County: 60.2 yearsCharlotte County60.2Jefferson County: 59.8 yearsJefferson County59.8Ontonagon County: 59.2 yearsOntonagon County59.2Harding County: 59.1 yearsHarding County59.1Jeff Davis County: 59.1 yearsJeff Davis County59.1McCormick County: 59 yearsMcCormick County59Lancaster County: 58.9 yearsLancaster County58.9Northumberland County: 58.8 yearsNorthumberland County58.8Highland County: 58.7 yearsHighland County58.7Custer County: 58.4 yearsCuster County58.4Alcona County: 58.3 yearsAlcona County58.3Citrus County: 57.9 yearsCitrus County57.9Hamilton County: 57.9 yearsHamilton County57.9Llano County: 57.8 yearsLlano County57.8Curry County: 57.7 yearsCurry County57.7Keweenaw County: 57.6 yearsKeweenaw County57.6Mineral County: 57.5 yearsMineral County57.5Sarasota County: 57.5 yearsSarasota County57.5Wheeler County: 57.3 yearsWheeler County57.3Towns County: 57.2 yearsTowns County57.2Sierra County: 57.1 yearsSierra County57.1Hickory County: 56.8 yearsHickory County56.8Iron County: 56.8 yearsIron County56.8Vilas County: 56.8 yearsVilas County56.8Hinsdale County: 56.6 yearsHinsdale County56.6Roscommon County: 56.6 yearsRoscommon County56.6Brunswick County: 56.5 yearsBrunswick County56.5Custer County: 56.5 yearsCuster County56.5Montmorency County: 56.5 yearsMontmorency County56.5San Juan County: 56.5 yearsSan Juan County56.5Aitkin County: 56.4 yearsAitkin County56.4Huerfano County: 56.4 yearsHuerfano County56.4Florence County: 56.2 yearsFlorence County56.2Real County: 56.2 yearsReal County56.2Presque Isle County: 56.1 yearsPresque Isle County56.1Union County: 56.1 yearsUnion County56.1Clay County: 55.5 yearsClay County55.5Yavapai County: 55.5 yearsYavapai County55.5Sumter County: 68.6 yearsSumter County68.6Catron County: 62 yearsCatron County62Charlotte County: 60.2 yearsCharlotte County60.2Jefferson County: 59.8 yearsJefferson County59.8Ontonagon County: 59.2 yearsOntonagon County59.2Harding County: 59.1 yearsHarding County59.1Jeff Davis County: 59.1 yearsJeff Davis County59.1McCormick County: 59 yearsMcCormick County59Lancaster County: 58.9 yearsLancaster County58.9Northumberland County: 58.8 yearsNorthumberland County58.8Highland County: 58.7 yearsHighland County58.7Custer County: 58.4 yearsCuster County58.4Alcona County: 58.3 yearsAlcona County58.3Citrus County: 57.9 yearsCitrus County57.9Hamilton County: 57.9 yearsHamilton County57.9Llano County: 57.8 yearsLlano County57.8Curry County: 57.7 yearsCurry County57.7Keweenaw County: 57.6 yearsKeweenaw County57.6Mineral County: 57.5 yearsMineral County57.5Sarasota County: 57.5 yearsSarasota County57.5Wheeler County: 57.3 yearsWheeler County57.3Towns County: 57.2 yearsTowns County57.2Sierra County: 57.1 yearsSierra County57.1Hickory County: 56.8 yearsHickory County56.8Iron County: 56.8 yearsIron County56.8Vilas County: 56.8 yearsVilas County56.8Hinsdale County: 56.6 yearsHinsdale County56.6Roscommon County: 56.6 yearsRoscommon County56.6Brunswick County: 56.5 yearsBrunswick County56.5Custer County: 56.5 yearsCuster County56.5Montmorency County: 56.5 yearsMontmorency County56.5San Juan County: 56.5 yearsSan Juan County56.5Aitkin County: 56.4 yearsAitkin County56.4Huerfano County: 56.4 yearsHuerfano County56.4Florence County: 56.2 yearsFlorence County56.2Real County: 56.2 yearsReal County56.2Presque Isle County: 56.1 yearsPresque Isle County56.1Union County: 56.1 yearsUnion County56.1Clay County: 55.5 yearsClay County55.5Yavapai County: 55.5 yearsYavapai County55.5
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

RankCounties2020
years		Change on 2019
1Sumter County68.6+0.4
2Catron County62-0.2
3Charlotte County60.2+0.3
4Jefferson County59.8+0.5
5Ontonagon County59.2+0.4
6Harding County59.1+2.5
6Jeff Davis County59.1+2.1
8McCormick County59+1.1
9Lancaster County58.9+0.4
10Northumberland County58.8+0.3
11Highland County58.7+0.6
12Custer County58.4+0.2
13Alcona County58.3-0.1
14Citrus County57.9+0.2
14Hamilton County57.9+1.1
16Llano County57.8+0.8
17Curry County57.7+0.4
18Keweenaw County57.6+0.1
19Mineral County57.5+2.1
19Sarasota County57.5+0.3
21Wheeler County57.3+0.8
22Towns County57.2+0.6
23Sierra County57.1+0.2
24Hickory County56.8+0.2
24Iron County56.8+0.2
24Vilas County56.8+0.4
27Hinsdale County56.6+1.2
27Roscommon County56.6+0.3
29Brunswick County56.5+0.6
29Custer County56.5+0.4
29Montmorency County56.5+0.3
29San Juan County56.5+0.7
33Aitkin County56.4+0.5
33Huerfano County56.4+0.2
35Florence County56.2+1
35Real County56.2+0.6
37Presque Isle County56.1+0.2
37Union County56.1+0.7
39Clay County55.5+0.8
39Yavapai County55.5+0.5
41Leelanau County55.4+0.6
41Middlesex County55.4+0.3
43Fall River County55.3+0.5
44Barnstable County55.2+0.6
44Sanders County55.2+0.6
46Indian River County55.1+0.5
46Storey County55.1+0.1
48Adams County54.90
48Carroll County54.9+0.5
48Pamlico County54.9+0.4
51Petroleum County54.8+4
52Highlands County54.7+0.3
52Ouray County54.7+0.8
54Burnett County54.6+0.7
54Door County54.6+0.3
54Mathews County54.6+0.5
54Sullivan County54.6+1.3
58Douglas County54.4+0.8
58La Paz County54.40
58Nelson County54.4+0.6
61Bayfield County54.3+0.3
61McIntosh County54.3+0.4
61Wahkiakum County54.3+0.5
64Sierra County54.2-0.2
65Boyd County54.1-0.6
65Grant County54.1+0.6
67Adams County54+0.2
67Boise County54+0.6
67Campbell County54+1.2
67Flagler County54+0.5
67Pacific County54+0.3
72Stone County53.9-0.1
73Cumberland County53.8+0.7
73Iron County53.8-0.2
73Lincoln County53.80
73Mohave County53.8+0.4
73Nye County53.8+0.4
78Benton County53.7+0.2
78Oscoda County53.7-0.5
78Polk County53.7+0.2
81Bandera County53.6-0.2
81Cook County53.6+0.4
81Custer County53.6+1.2
81Iosco County53.6+0.4
85Prairie County53.5+1.7
86Esmeralda County53.4+0.8
86Golden Valley County53.4+1.5
86Lincoln County53.4+0.4
86Mackinac County53.4+0.1
86Quitman County53.4+1
86Sabine County53.4+0.2
92Cherokee County53.3+0.7
92Martin County53.3+0.2
92Meagher County53.3-0.2
92Menard County53.3+0.6
92Mora County53.3+1.5
92Pope County53.3+1.5
98Fannin County53.2+0.3
99Gillespie County53.1+0.3
100Oneida County53+0.5
100Plumas County530
100Price County53+0.4
103Clallam County52.9+0.4
103Mason County52.9+0.1
103Pendleton County52.9+0.1
103Potter County52.9+0.4
103Sawyer County52.9+0.6
103Sheridan County52.9+1.5
103Washburn County52.9+0.4
110Collier County52.8+0.4
110Lincoln County52.8+0.3
110Madison County52.8+0.1
110Schoolcraft County52.8+0.3
114Rappahannock County52.7+0.6
114Wells County52.7+0.7
116Baxter County52.6-0.1
116Blanco County52.6+0.3
116Charles City County52.6+0.9
116Columbia County52.60
116Kent County52.6+1.1
116Lemhi County52.6+0.3
116Marion County52.6-0.6
116Mineral County52.6-0.6
124Blaine County52.5+4.7
124Foard County52.5+2.1
124Marion County52.5+0.1
124Wallowa County52.5+0.1
128Granite County52.4-0.5
129Hardin County52.3+0.3
130Loup County52.2+4.3
131Antrim County52.1+0.1
131Aransas County52.1-0.4
131De Baca County52.1+1.6
131Georgetown County52.1+0.8
135Alpine County52+3.3
135Archuleta County52+0.3
135Garden County52-0.8
135Kalawao County52-0.5
135Lincoln County52+0.1
135Mariposa County52-0.3
135Nelson County52+0.3
135Ozark County52+0.3
135Sioux County52+2.1
144Costilla County51.9+0.5
144Northampton County51.9+0.5
144Smith County51.9+0.3
144Stonewall County51.9-1.2
144Surry County51.9+0.6
149Clearwater County51.8+0.3
149Emmons County51.8-0.4
149Pickett County51.8+0.9
152Amador County51.7+0.2
152Camden County51.7+0.4
152Essex County51.7+0.1
152Gila County51.7+0.4
152Greene County51.7+0.5
157Calaveras County51.6+0.1
157Northampton County51.6+0.3
157Piscataquis County51.6-0.4
157Talbot County51.6-0.2
157Taliaferro County51.6+1.5
162Adams County51.5-0.1
162Cape May County51.5+0.3
162Lake County51.5+0.7
162McPherson County51.5+2.5
162Teller County51.5+0.2
167Bath County51.4+0.7
167Cameron County51.4+0.3
167Ferry County51.4+0.1
167Gogebic County51.4+0.3
167Idaho County51.4+0.3
167Judith Basin County51.4+0.1
167Lake of the Woods County51.4+1
167Newton County51.4+0.1
167Powder River County51.4+1.6
176Kimble County51.3-1.1
177Cheboygan County51.2+0.2
177Crawford County51.2+0.5
177Edwards County51.2+0.9
177Pend Oreille County51.2-0.6
181Decatur County51.1+0.7
181Macon County51.1+0.6
181Musselshell County51.1-0.2
181Terrell County51.1+2.8
185Alleghany County51+0.6
185Grant County51-0.5
185Montgomery County510
185Towner County51+2.3
189Gladwin County50.9+0.3
189Patrick County50.9+0.6
191Benzie County50.8+0.1
191Franklin County50.8+0.3
191Sussex County50.8+0.5
191Talbot County50.8+0.2
195Carteret County50.7+0.5
195Deuel County50.7+1.2
195Ogemaw County50.7+0.2
198Cleburne County50.6+0.3
198Jewell County50.6+0.4
200Brown County50.5+0.5
200Coos County50.5+0.3
200Elk County50.50
200Graham County50.5-0.6
200Grand Isle County50.5+1
200Mills County50.5+0.2
200Perquimans County50.5+0.2
200Wibaux County50.5+2.7
200Worcester County50.5+0.1
209Arenac County50.4-0.3
209Harlan County50.4+0.1
209Henderson County50.4+0.6
209Kerr County50.4+0.1
209Koochiching County50.4+0.7
209Lake County50.4-0.2
209Manistee County50.4+0.2
209Marquette County50.4+0.6
209Transylvania County50.4+0.2
209Wood County50.4+0.2
219Coleman County50.3-0.5
219Jo Daviess County50.3+0.2
219King and Queen County50.3+1.1
219Ravalli County50.3+0.4
223Cass County50.2+0.2
223Marion County50.2+0.1
223Trinity County50.2-0.5
223Tucker County50.2+0.6
227Carbon County50.1-0.2
227Coke County50.1+0.1
227Ottawa County50.1+0.3
227Pocahontas County50.1+0.1
227Taos County50.1+0.7
227Twiggs County50.1+0.3
233Fairfield County50+0.5
233Keya Paha County50+3.3
233Loudon County50+0.7
233McIntosh County50+0.6
233Ness County50-0.6
233Rabun County50+0.8
233Sedgwick County50+0.5
233Van Buren County50+0.3
233Warren County50+0.6
233Waushara County50+0.6
243Ashe County49.9+0.3
243Charlevoix County49.9+0.4
243Colfax County49.9-0.1
243Deer Lodge County49.9+0.7
243Kimball County49.9+1
243Nuckolls County49.9+0.3
243Westmoreland County49.9+0.4
243Wheeler County49.9+1.2

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), 2020) [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), 2020. 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=2020. 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), 2020. 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=2020.

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), 2020 [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=2020 (Accessed: 12 October 2026).

BibTeX
@misc{census_us_counties_by_median_2020,
  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), 2020}},
  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=2020. 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), 2020
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=2020
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/us-counties?period=2020.
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  -
Embed this chart

Paste this code into a web page or a blog post. The chart shows the latest figures as they are published, with the source and a link back to this page.

Sites that read oEmbed links, such as WordPress, can show the chart when you paste the link to this page.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank US counties by median age on 1 July (US county estimates) using official data, and cite the source.
rank_places {"indicator":"median_age_pep","level":"province","within":"United States","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=median_age_pep&level=province&within=United%20States&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

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

Sumter County, with 68.6 years in 2020, according to the U.S. Census Bureau.

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

Lexington city, with 22.5 years in 2020.

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