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County · code 36111

Ulster CountyNew York

Ulster County is located in New York and was created in 1683. Its county seat is Kingston.

  • Founded1683
  • County seatKingston
  • Named forUlster, Ireland
  • Land area1,124 sq mi + 37 sq mi water
  • Population181,851 2020 Census
  • Parcels mapped86,594 checked 15 October 2026
Open the free map Click any parcel in Ulster County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

GreeneOrangeDutchessSullivanColumbiaDelaware Kingston Census outline · seat marked

Where it is

Ulster 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.

Albany CountyAllegany CountyBronx CountyBroome CountyCattaraugus CountyCayuga CountyChautauqua CountyChemung CountyChenango CountyClinton CountyColumbia CountyCortland CountyDelaware CountyDutchess CountyErie CountyEssex CountyFranklin CountyFulton CountyGenesee CountyGreene CountyHamilton CountyHerkimer CountyJefferson CountyKings CountyLewis CountyLivingston CountyMadison CountyMonroe CountyMontgomery CountyNassau CountyNew York CountyNiagara CountyOneida CountyOnondaga CountyOntario CountyOrange CountyOrleans CountyOswego CountyOtsego CountyPutnam CountyQueens CountyRensselaer CountyRichmond CountyRockland CountySt. Lawrence CountySaratoga CountySchenectady CountySchoharie CountySchuyler CountySeneca CountySteuben CountySuffolk CountySullivan CountyTioga CountyTompkins CountyWarren CountyWashington CountyWayne CountyWestchester CountyWyoming CountyYates CountyUlster County Ulster
Counties of New York · Ulster highlighted

History

Founded in 1683

An old deed may name a county that no longer exists, or a boundary that has since moved.

Ulster County was created in 1683 from non-county area in New York and was named after Ulster. In 1708, Dutchess County was detached from Ulster after being attached for administrative purposes, and over the following century Ulster lost territory to the creation of Delaware, Greene, and Sullivan Counties.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1683
    Ulster County created Ulster created from non-county area in New York. · N.Y. Col. Laws, ch. 4/1:122
  2. 1701
    Gained territory Ulster gained from Orange; Dutchess's attachment to Ulster was confirmed.
    from Orangefrom Dutchess
    · N.Y. Col. Laws, ch. 94/1:453
  3. 1709
    Lost territory Ulster lost to Orange.
    to Orange
    · N.Y. Col. Laws, ch. 202/1:686
  4. 1773
    Gained territory Ulster gained from Sussex (New Jersey) when King George Iii approved the boundary between New Jersey and New York, as determined by a commission appointed in 1769 at the joint request of the two colonies after decades of dispute.
    from Sussex (N.J.)from Iii
    · Pratt, 2:789; Snyder, 13-14; Van Zandt, 76
  5. 1774
    Gained territory Ulster gained from Albany.
    from Albany
    · N.Y. Col. Laws, ch. 1665/5:662
Show all 16 changes (11 more)
  1. 1683
    Ulster County created Ulster created from non-county area in New York. · N.Y. Col. Laws, ch. 4/1:122
  2. 1693
    Changed Dutchess was attached to Ulster for administrative and judicial purposes.
    Dutchess
    · O'Callaghan, 1:201
  3. 1701
    Gained territory Ulster gained from Orange; Dutchess's attachment to Ulster was confirmed.
    from Orangefrom Dutchess
    · N.Y. Col. Laws, ch. 94/1:453
  4. 1708
    Changed In 1708, Dutchess was fully organized, detached from Ulster.
    Dutchess
    · N.Y. Col. Laws, ch. 94/1:453
  5. 1709
    Lost territory Ulster lost to Orange.
    to Orange
    · N.Y. Col. Laws, ch. 202/1:686
  6. 1773
    Gained territory Ulster gained from Sussex (New Jersey) when King George Iii approved the boundary between New Jersey and New York, as determined by a commission appointed in 1769 at the joint request of the two colonies after decades of dispute.
    from Sussex (N.J.)from Iii
    · Pratt, 2:789; Snyder, 13-14; Van Zandt, 76
  7. 1774
    Gained territory Ulster gained from Albany.
    from Albany
    · N.Y. Col. Laws, ch. 1665/5:662
  8. 1797
    Lost territory Ulster lost to creation of Delaware.
    to Delaware
    · N.Y. Laws 1797, 20th sess., ch. 33/p. 39
  9. 1798
    Gained territory Ulster gained from Albany, lost to Orange.
    from Albanyfrom Orange
    · N.Y. Laws 1798, 21st sess., ch. 93/p. 273
  10. 1800
    Lost territory Ulster lost to creation of Greene.
    to Greene
    · N.Y. Laws 1800, 23d sess., ch. 59/p. 503
  11. 1801
    Lost territory Ulster lost to Delaware and Greene.
    to Delawareto Greene
    · N.Y. Laws 1801, 24th sess., ch. 123/p. 290
  12. 1809
    Lost territory Ulster lost to creation of Sullivan.
    to Sullivan
    · N.Y. Laws 1808, 32d sess., ch. 126, sec. 1/p. 495
  13. 1812
    Gained territory Ulster gained from Greene.
    from Greene
    · N.Y. Laws 1812, 35th sess., ch. 46/p. 382
  14. 1812
    Gained territory Ulster gained small area from Delaware.
    from Delaware
    · N.Y. Laws 1812, 35th sess., ch. 88/p. 427
  15. 1814
    Gained territory Ulster gained from Greene.
    from Greene
    · N.Y. Laws 1814, 37th sess., ch. 211/p. 275
  16. 1822
    Lost territory Ulster lost small area to Greene.
    to Greene
    · N.Y. Laws 1822, 45th sess., ch. 243/p. 257

Land and parcels

What the maps cover in Ulster

Who publishes each layer, how good it is, and when we last checked.

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

Ulster by the Census

Population
181,851 2020 Census count
Housing units
85,853 2020 Census count
Land area
1,124 square miles
Water area
37 square miles
People per sq mi
162 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Ulster County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Ulster County

When was Ulster County founded?
Ulster County was founded in 1683, and named after Ulster, Ireland.
What is the county seat of Ulster County?
The county seat of Ulster County is Kingston.
Is there an online parcel map for Ulster County?
Yes. Ulster County publishes a parcel map of 86,594 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Ulster County's boundary or name changed?
Ulster County was created in 1683. Since then the Atlas of Historical County Boundaries records 15 later changes, chiefly involving Greene County, Delaware County and Dutchess County.
Is my lot in a flood zone?
We do not have flood maps for Ulster County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door