County · code 36123
Yates CountyNew York
Yates County is a county in New York with its seat in Penn Yan, formed in 1823.
- Founded1823
- County seatPenn Yan
- Named forJoseph Christopher Yates
- Land area338 sq mi + 38 sq mi water
- Population24,774 2020 Census
- Parcels mapped15,871 checked 16 October 2026
Where it is
Yates on the map of New York
New York has 62 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1823 from Ontario County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Yates County was created from Ontario County on February 5, 1823, and named after Joseph Christopher Yates. The county gained territory from Steuben County in 1826 but lost land to Seneca and Tompkins counties in 1828. In 1946, Yates gained additional territory from Schuyler and Seneca counties.
- 1823Yates County created Yates created from Ontario. · N.Y. Laws 1823, 46th sess., ch. 30, sec. 1/p. 21
- 1826Gained territory Yates gained from Steuben. · N.Y. Laws 1824, 47th sess., ch. 171/p. 182
- 1828
- 1860Changed Legislature authorized Ontario to gain from Yates, but change never took effect. · N.Y. Laws 1860, 83d sess., ch. 76/p. 120
- 1946Gained territory Yates gained from Schuyler and Seneca. · N.Y. Laws 1946, 169th sess., ch. 901/p. 1686
Land and parcels
What the maps cover in Yates
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 15,871 parcels from Yates County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 16 October 2026 -
Address points Official
One point per address, 15,739 in all from NYS Office of Information Technology Services (ITS), Geospatial Services / GIS Program Office (AGOL org 'ShareGIS NY', owner NYSGIS_GPO).
edited 25 September 2026 · checked 14 October 2026 -
Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- Official
- from the office that keeps the record
- Good enough
- a reliable statewide or national copy
- Fallback
- a guide only; check the official record
- Missing
- nothing public found yet
People and land
Yates by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
Rules and offices
Yates County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Yates County.
See your own lot on these maps
Open Yates County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.
Questions
Common questions about Yates County
- When was Yates County founded?
- Yates County was founded in 1823, formed from Ontario County, and named after Joseph Christopher Yates.
- What is the county seat of Yates County?
- The county seat of Yates County is Penn Yan.
- Is there an online parcel map for Yates County?
- Yes. Yates County publishes a parcel map of 15,871 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Yates County's boundary or name changed?
- Yates County was created in 1823 from Ontario County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Seneca County, Ontario County and Schuyler County.
- Is my lot in a flood zone?
- We do not have flood maps for Yates County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby