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

Slope County had the highest median age on 1 July (US county estimates) of 53 counties in 2024, at 53.2 years. Sioux County had the lowest, at 28.5 years. The median was 44.1 years. Source: the U.S. Census Bureau.

Highest53.2Slope County

Lowest28.5Sioux County

Median44.153 counties

Map of counties, 2024

Under 36
36 to 42
42 to 44
44 to 46
46 to 48
48 and over

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.

All counties, 2024

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	2024 years	Change on 2023
1	Slope County	53.2	+1.6
2	Grant County	52.5	0
3	Nelson County	52.2	-0.9
4	Sheridan County	51.6	+0.2
5	McIntosh County	51.5	+0.1
6	Wells County	50.6	-1
7	Adams County	50.4	-0.8
8	Emmons County	50.3	-0.3
9	Griggs County	49	+0.1
10	Steele County	48	-0.2
11	McLean County	47.2	-0.2
12	LaMoure County	46.7	-0.1
13	Towner County	46.6	-1.7
14	Cavalier County	46.4	-0.6
14	Sargent County	46.4	+0.8
16	Pembina County	46.3	+0.1
17	Kidder County	45.8	-0.5
18	Logan County	45.7	-0.3
19	Oliver County	45.4	+0.3
19	Pierce County	45.4	-0.1
21	Golden Valley County	45.2	-0.4
22	Bottineau County	45.1	+0.1
23	Foster County	44.5	-0.8
24	Hettinger County	44.4	-0.6
24	McHenry County	44.4	0
26	Bowman County	44.2	0
27	Burke County	44.1	+0.1
28	Mercer County	43.8	0
29	Barnes County	43.7	0
29	Divide County	43.7	-0.2
29	Walsh County	43.7	-0.5
32	Ransom County	43	+0.2
33	Billings County	42.9	0
34	Eddy County	42.8	-0.7
34	Renville County	42.8	-1
36	Ramsey County	40.9	0
36	Stutsman County	40.9	+0.1
38	Traill County	40.4	0
39	Dickey County	40.1	-0.4
40	Burleigh County	38.8	+0.2
40	Morton County	38.8	+0.2
40	Richland County	38.8	-0.5
43	Dunn County	38.6	+0.3
44	Mountrail County	35.8	+0.2
45	Stark County	35.7	+0.2
46	Ward County	34.1	+0.3
47	Cass County	33.5	+0.2
48	Rolette County	33.2	+0.3
49	Williams County	33	0
50	Benson County	32.6	0
51	McKenzie County	32.2	0
52	Grand Forks County	31.6	+0.1
53	Sioux County	28.5	-0.9

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 North Dakota 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, Counties in North Dakota 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/north-dakota-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. Counties in North Dakota 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/north-dakota-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, Counties in North Dakota 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/north-dakota-counties?period=2024 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_north_dakota_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: Counties in North Dakota 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/north-dakota-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: Counties in North Dakota 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/north-dakota-counties?period=2024
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/north-dakota-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)?

Slope County, with 53.2 years in 2024, according to the U.S. Census Bureau.

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

Sioux County, with 28.5 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.