County · code 41023
Grant CountyOregon
Grant County is a county in Oregon with its seat in Canyon City, formed on October 14, 1864.
- Founded1864
- County seatCanyon City
- Named forUlysses S. Grant
- Land area4,528 sq mi + 0.7 sq mi water
- Population7,233 2020 Census
- Parcels mapped8,461 checked 16 October 2026
Where it is
Grant on the map of Oregon
Oregon has 36 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1864 from Umatilla County, Wasco County and Union County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Grant County was created from Umatilla and Wasco counties, with its northeast corner initially overlapping the southwest portion of Union County. The county was named after Ulysses S. Grant. Grant County lost territory over time: Lake County was created from its lands in 1874, Baker and Union counties received portions in 1878, Crook County in 1885, Lake County again in 1885, Harney County in 1889, and Wheeler County in 1899.
- 1864Grant County created Grant created from Umatilla and Wasco. Northeast corner of Grant overlapped the southwest portion of Union (see Overlap Area). · Ore. Laws 1864, 3rd reg. sess., p. 43
- 1874
- 1878
- 1885
- 1885
Show all 12 changes
- 1864Grant County created Grant created from Umatilla and Wasco. Northeast corner of Grant overlapped the southwest portion of Union (see Overlap Area). · Ore. Laws 1864, 3rd reg. sess., p. 43
- 1870Boundary clarified Grant boundaries redefined; lost to Baker, area of overlap with Union was reduced. · Ore. Laws 1870, 6th reg. sess., pp. 167-168
- 1872Boundary clarified Grant boundaries redefined; gained from Baker, area of overlap with Union increased. · Ore. Laws 1872, 7th reg. sess., pp. 34-35
- 1874
- 1874Changed In an effort to resolve boundary conflicts between Baker, Grant, and Union the legislature passed "An Act to Create a Commission from Grant and Baker Counties, to establish an Initial Point to define the Boundary Line between Grant and Baker Counties, and to Create a Commission from Baker and Union Counties to designate by Name which Fork of the North Fork of Powder River shall be the line between Baker and Union Counties." · Ore. Laws 1874, 8th reg. sess., pp. 91-92
- 1878
- 1885
- 1885
- 1889Lost territory Grant lost to creation of Harney. · Ore. Laws 1889, gen., 15th reg. sess., pp. 47-49
- 1899Lost territory Grant lost to creation of Wheeler. · Ore. Laws 1899, 20th reg. sess., pp. 51-55
- 1905Boundary clarified Grant redefined (no change).no change· Ore. Laws 1905, 23rd reg. sess., ch. 108/pp. 207-208
- 1925Boundary clarified Grant boundaries redefined to run along township and range lines (no change).no change· Ore. Laws 1925, gen., 33rd reg. sess., ch. 6/p. 17
Land and parcels
What the maps cover in Grant
Who publishes each layer, how good it is, and when we last checked.
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Parcels Fallback
Lot lines and tax-map numbers for 8,461 parcels from Grant County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey. This copy is a fallback, not the county's own: use it as a guide and check the official record.
edited 9 March 2023 · checked 16 October 2026 -
Address points Official
One point per address, 4,661 in all from State of Oregon — Department of Administrative Services Geospatial Enterprise Office (GEOHub) with Oregon Department of Emergency Management 9-1-1 program.
edited 16 January 2026 · checked 13 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
Grant 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
Who to ask before you build, dig or sell
Official county pages only. We link to them; we do not copy them, because they change.
Inside a city or town, permits usually come from that city rather than the county.
Zoning and code
County government
- County government
The official website of Grant County.
See your own lot on these maps
Open Grant 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 Grant County
- When was Grant County founded?
- Grant County was founded in 1864, formed from Umatilla County, Wasco County and Union County, and named after Ulysses S. Grant.
- What is the county seat of Grant County?
- The county seat of Grant County is Canyon City.
- Is there an online parcel map for Grant County?
- Yes. Grant County publishes a parcel map of 8,461 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Grant County's boundary or name changed?
- Grant County was created in 1864 from Umatilla County, Wasco County and Union County. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Baker County, Lake County and Union County.
- Who issues building permits in Grant County?
- The county's page on building permits: Permits. Inside a city or town, ask that city first.
- Is my lot in a flood zone?
- We do not have flood maps for Grant County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby