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

Sullivan County had the highest median age on 1 July (US county estimates) of 67 counties in 2023, at 54.9 years. Centre County had the lowest, at 33 years. The median was 44.2 years. Source: the U.S. Census Bureau.

Highest54.9Sullivan County

Lowest33Centre County

Median44.267 counties

Top 40 counties, 2023

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	2023 years	Change on 2022
1	Sullivan County	54.9	+0.1
2	Cameron County	51.8	-0.2
3	Potter County	49.6	+0.5
4	Wayne County	49.1	0
5	Pike County	48.8	+0.1
6	Elk County	48.5	+0.2
7	Susquehanna County	47.7	-0.4
8	Venango County	47.6	0
9	Armstrong County	47.5	+0.2
10	Bedford County	47.4	-0.1
10	Warren County	47.4	-0.1
10	Westmoreland County	47.4	0
13	Somerset County	47.2	+0.1
14	Forest County	47	+0.4
15	Carbon County	46.3	+0.1
15	Clearfield County	46.3	0
17	Fayette County	46	0
18	Cambria County	45.9	0
19	Fulton County	45.4	+0.1
20	Beaver County	45.2	-0.2
21	Lawrence County	45.1	0
21	Tioga County	45.1	+0.4
23	Jefferson County	45	0
24	Mercer County	44.9	0
25	Washington County	44.8	0
25	Wyoming County	44.8	+0.1
27	Bucks County	44.5	+0.1
27	Crawford County	44.5	+0.2
29	Schuylkill County	44.4	-0.4
30	Adams County	44.2	-0.1
30	Blair County	44.2	0
30	Greene County	44.2	-0.1
30	Huntingdon County	44.2	+0.1
30	Northumberland County	44.2	-0.1
35	McKean County	44	+0.2
36	Perry County	43.9	+0.1
37	Monroe County	43.8	+0.1
38	Bradford County	43.6	-0.1
39	Butler County	43.5	+0.2
40	Mifflin County	43.4	0
41	Montour County	43.3	0
42	Juniata County	43	-0.2
43	Clarion County	42.9	+0.3
44	Luzerne County	42.6	-0.1
45	Lackawanna County	42.3	0
46	Northampton County	42.1	0
47	Franklin County	42	-0.1
48	Lebanon County	41.9	+0.1
49	Lycoming County	41.8	0
50	Montgomery County	41.7	+0.1
51	York County	41.4	0
52	Indiana County	41	0
53	Erie County	40.9	+0.3
54	Chester County	40.8	+0.2
54	Clinton County	40.8	-0.1
56	Columbia County	40.7	-0.2
57	Allegheny County	40.6	+0.2
57	Snyder County	40.6	0
59	Cumberland County	40.3	0
60	Berks County	40.2	0
61	Lehigh County	40	+0.1
62	Union County	39.8	+0.3
63	Dauphin County	39.7	0
64	Delaware County	39.4	0
64	Lancaster County	39.4	0
66	Philadelphia County	35.2	+0.2
67	Centre County	33	+0.5

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 Pennsylvania by median age on 1 July (US county estimates), 2023) [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 Pennsylvania by median age on 1 July (US county estimates), 2023. 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/pennsylvania-counties?period=2023. 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 Pennsylvania by median age on 1 July (US county estimates), 2023. 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/pennsylvania-counties?period=2023.

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 Pennsylvania by median age on 1 July (US county estimates), 2023 [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/pennsylvania-counties?period=2023 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_pennsylvania_by_2023,
  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 Pennsylvania by median age on 1 July (US county estimates), 2023}},
  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/pennsylvania-counties?period=2023. 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 Pennsylvania by median age on 1 July (US county estimates), 2023
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/pennsylvania-counties?period=2023
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2023.
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.

Embed code

<iframe src="https://invokely.ai/embed/rankings/median-age-july-1-us-counties/pennsylvania-counties?period=2023" width="760" height="500" title="Counties in Pennsylvania by median age on 1 July (US county estimates), 2023, chart from Invokely" loading="lazy" style="border:0;width:100%;max-width:760px" referrerpolicy="strict-origin-when-cross-origin"></iframe>

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 Counties in Pennsylvania 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":"Pennsylvania","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=median_age_pep&level=province&within=Pennsylvania&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)?

Sullivan County, with 54.9 years in 2023, according to the U.S. Census Bureau.

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

Centre County, with 33 years in 2023.

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.