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

Hamilton County had the highest median age on 1 July (US county estimates) of 62 counties in 2015, at 54.3 years. Tompkins County had the lowest, at 30.3 years. The median was 41.8 years. Source: the U.S. Census Bureau.

Highest54.3Hamilton County

Lowest30.3Tompkins County

Median41.862 counties

Map of counties, 2015

Under 38
38 to 40
40 to 42
42 to 43
43 to 44
44 and over

years, 2015. 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, 2015

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	2015 years	Change on 2014
1	Hamilton County	54.3	+0.2
2	Columbia County	47.2	+0.4
3	Delaware County	47	+0.7
4	Essex County	46.2	+0.4
5	Warren County	46.1	+0.4
6	Greene County	45.9	+0.3
6	Schuyler County	45.9	+0.5
8	Chenango County	44.7	+0.4
9	Schoharie County	44.6	+0.4
10	Putnam County	44	+0.3
11	Tioga County	43.9	+0.2
11	Ulster County	43.9	+0.4
13	Fulton County	43.8	+0.4
13	Herkimer County	43.8	+0.4
13	Ontario County	43.8	+0.3
16	Wayne County	43.6	+0.3
17	Washington County	43.5	+0.2
18	Genesee County	43.4	+0.3
19	Niagara County	43.3	+0.2
20	Sullivan County	43	+0.3
21	Cayuga County	42.9	+0.1
22	Steuben County	42.7	+0.2
23	Saratoga County	42.4	+0.1
23	Wyoming County	42.4	+0.1
25	Orleans County	42.3	-0.1
25	Seneca County	42.3	0
27	Chautauqua County	42.2	+0.2
27	Otsego County	42.2	+0.2
29	Cattaraugus County	42.1	+0.4
29	Dutchess County	42.1	+0.3
31	Yates County	41.8	+0.2
32	Lewis County	41.7	+0.3
32	Nassau County	41.7	+0.1
34	Montgomery County	41.5	0
35	Chemung County	41.3	-0.1
35	Suffolk County	41.3	+0.2
37	Livingston County	41.2	+0.3
38	Oneida County	41.1	-0.1
39	Madison County	41	+0.1
40	Franklin County	40.9	+0.4
41	Westchester County	40.6	+0.1
42	Clinton County	40.4	+0.3
43	Erie County	40.2	-0.1
44	Schenectady County	40.1	0
45	Broome County	39.9	-0.1
46	Oswego County	39.8	+0.3
46	Richmond County	39.8	+0.3
48	Rensselaer County	39.5	0
49	Monroe County	38.9	+0.1
49	Onondaga County	38.9	+0.1
51	Allegany County	38.8	+0.2
52	Albany County	38.3	0
53	Queens County	38	+0.1
54	St. Lawrence County	37.9	+0.4
55	Cortland County	37.5	+0.5
56	Orange County	37.1	+0.1
57	New York County	36.6	0
58	Rockland County	35.9	-0.2
59	Kings County	34.6	+0.2
60	Bronx County	34	+0.3
61	Jefferson County	32.3	+0.4
62	Tompkins County	30.3	+0.2

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 New York by median age on 1 July (US county estimates), 2015) [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 New York by median age on 1 July (US county estimates), 2015. 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/new-york-counties?period=2015. 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 New York by median age on 1 July (US county estimates), 2015. 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/new-york-counties?period=2015.

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 New York by median age on 1 July (US county estimates), 2015 [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/new-york-counties?period=2015 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_new_york_2015,
  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 New York by median age on 1 July (US county estimates), 2015}},
  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/new-york-counties?period=2015. 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 New York by median age on 1 July (US county estimates), 2015
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/new-york-counties?period=2015
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/new-york-counties?period=2015.
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)?

Hamilton County, with 54.3 years in 2015, according to the U.S. Census Bureau.

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

Tompkins County, with 30.3 years in 2015.

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.