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 2017, at 55.9 years. Tompkins County had the lowest, at 30.6 years. The median was 41.9 years. Source: the U.S. Census Bureau.

Highest55.9Hamilton County

Lowest30.6Tompkins County

Median41.962 counties

Map of counties, 2017

Under 39
39 to 41
41 to 42
42 to 43
43 to 44
44 and over

years, 2017. 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, 2017

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	2017 years	Change on 2016
1	Hamilton County	55.9	+0.7
2	Columbia County	47.9	+0.4
3	Delaware County	47.5	+0.2
4	Essex County	46.8	+0.3
5	Warren County	46.7	+0.3
6	Schuyler County	46.6	+0.4
7	Greene County	46.4	+0.3
8	Schoharie County	45.4	+0.4
9	Chenango County	45.3	+0.3
10	Putnam County	44.3	+0.1
10	Tioga County	44.3	+0.1
12	Fulton County	44.2	+0.1
12	Ulster County	44.2	+0.1
14	Herkimer County	44.1	+0.3
14	Ontario County	44.1	+0.1
14	Washington County	44.1	+0.3
17	Wayne County	43.9	+0.2
18	Genesee County	43.6	+0.1
19	Niagara County	43.4	0
20	Steuben County	43.2	+0.2
21	Cayuga County	43.1	+0.1
22	Wyoming County	42.7	0
23	Chautauqua County	42.6	+0.1
23	Saratoga County	42.6	+0.1
23	Sullivan County	42.6	0
26	Orleans County	42.5	0
26	Otsego County	42.5	+0.1
26	Seneca County	42.5	+0.1
29	Dutchess County	42.4	+0.1
30	Cattaraugus County	42.3	+0.3
31	Lewis County	42	+0.1
32	Chemung County	41.8	+0.2
33	Livingston County	41.7	+0.3
33	Nassau County	41.7	0
33	Suffolk County	41.7	+0.2
36	Yates County	41.5	+0.1
37	Madison County	41.4	+0.3
38	Montgomery County	41.3	-0.1
39	Franklin County	41.2	+0.3
40	Oneida County	41	-0.1
41	Clinton County	40.8	+0.2
41	Westchester County	40.8	+0.1
43	Schenectady County	40.1	0
44	Erie County	40	-0.1
45	Broome County	39.9	0
45	Oswego County	39.9	0
45	Richmond County	39.9	+0.1
48	Rensselaer County	39.4	0
49	Monroe County	39.2	+0.1
50	Onondaga County	39	+0.1
51	Allegany County	38.8	+0.2
52	St. Lawrence County	38.5	+0.4
53	Albany County	38.4	+0.1
53	Queens County	38.4	+0.2
55	Cortland County	38.2	+0.4
56	Orange County	37.1	0
57	New York County	36.8	+0.1
58	Rockland County	35.6	-0.2
59	Kings County	34.8	+0.1
60	Bronx County	34.6	+0.3
61	Jefferson County	32.9	-0.1
62	Tompkins County	30.6	+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), 2017) [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), 2017. 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=2017. 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), 2017. 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=2017.

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), 2017 [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=2017 (Accessed: 12 October 2026).

BibTeX

@misc{census_counties_in_new_york_2017,
  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), 2017}},
  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=2017. 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), 2017
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=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/median-age-july-1-us-counties/new-york-counties?period=2017.
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 55.9 years in 2017, according to the U.S. Census Bureau.

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

Tompkins County, with 30.6 years in 2017.

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.