County · code 36107
Tioga CountyNew York
Tioga County is a county in New York, with its seat in Owego. It was created in 1791 from Montgomery County.
- Founded1791
- County seatOwego
- Land area519 sq mi + 4.3 sq mi water
- Population48,455 2020 Census
- Parcels mapped26,207 checked 15 October 2026
Where it is
Tioga 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 1791 from Montgomery County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Tioga County was formed in 1791 from Montgomery County. Over the following decades, it lost territory to the creation of Onondaga, Chenango, Broome, Tompkins, and Chemung counties, though it gained some land back from Broome County in 1822.
- 1791Tioga County created Tioga created from Montgomery. · N.Y. Laws 1791, 14th sess., ch. 10/p. 206
- 1794Lost territory Tioga lost to creation of Onondaga. · N.Y. Laws 1794, 17th sess., ch. 18/p. 491
- 1798Lost territory Tioga lost to creation of Chenango. · N.Y. Laws 1798, 21st sess., ch. 31/p. 170
- 1806Lost territory Tioga lost to creation of Broome. · N.Y. Laws 1806, 29th sess., ch. 89/p. 431
- 1822Gained territory Tioga gained from Broome. · N.Y. Laws 1822, 45th sess., ch. 75, sec. 1/p. 76
- 1823Lost territory Tioga lost to Tompkins. · N.Y. Laws 1822, 45th sess., ch. 75, sec. 13/p. 78
- 1836Lost territory Tioga lost to creation of Chemung. · N.Y. Laws 1836, 59th sess., ch. 77, sec. 1/p. 102
Land and parcels
What the maps cover in Tioga
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 26,207 parcels from Tioga County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 26 August 2026 · checked 15 October 2026 -
Address points Official
One point per address, 27,452 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
Tioga 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
Tioga 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 Tioga County.
See your own lot on these maps
Open Tioga 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 Tioga County
- When was Tioga County founded?
- Tioga County was founded in 1791, formed from Montgomery County.
- What is the county seat of Tioga County?
- The county seat of Tioga County is Owego.
- Is there an online parcel map for Tioga County?
- Yes. Tioga County publishes a parcel map of 26,207 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Tioga County's boundary or name changed?
- Tioga County was created in 1791 from Montgomery County. Since then the Atlas of Historical County Boundaries records 6 later changes, chiefly involving Broome County, Chemung County and Chenango County.
- Is my lot in a flood zone?
- We do not have flood maps for Tioga County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby