County · code 04027
Yuma CountyArizona
Yuma County is located in Arizona and was formed in 1864 as one of the original counties in Arizona Territory, with its seat in Yuma.
- Founded1864
- County seatYuma
- Named forFort Yuma Quechan Indian Tribe
- Land area5,514 sq mi + 5.1 sq mi water
- Population203,881 2020 Census
- Parcels mapped97,740 checked 15 October 2026
Where it is
Yuma on the map of Arizona
Arizona has 15 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1864
An old deed may name a county that no longer exists, or a boundary that has since moved.
Yuma County was created on November 10, 1864, as one of four original counties in Arizona Territory. The county was named after Fort Yuma and the Quechan Indian Tribe. In 1983, Yuma County lost territory to the creation of La Paz County.
- 1864Yuma County created Yuma created as one of four original counties in Arizona Territory. · Howell Code, Ariz. Terr. Laws 1864, 1st assy., ch. 2/ pp. 24-25
- 1963Boundary clarified Yuma boundary with the state of California was redefined as part of an interstate compact to account for changes in the course of the Colorado River.no change· Ariz. Laws 1963, 25th leg., 1st reg. sess., ch. 77/ pp. 142-150
- 1983Lost territory Yuma lost to creation of La Paz. · Ariz. Laws 1983, 36th assy., ch. 291/pp. 1089-1094
Land and parcels
What the maps cover in Yuma
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 97,740 parcels from Yuma County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026 -
Address points Missing
No public address points layer found for Yuma County yet.
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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
Yuma 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
Yuma 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 Yuma County.
See your own lot on these maps
Open Yuma 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 Yuma County
- When was Yuma County founded?
- Yuma County was founded in 1864, and named after Fort Yuma Quechan Indian Tribe.
- What is the county seat of Yuma County?
- The county seat of Yuma County is Yuma.
- Is there an online parcel map for Yuma County?
- Yes. Yuma County publishes a parcel map of 97,740 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Yuma County's boundary or name changed?
- Yuma County was created in 1864. Since then the Atlas of Historical County Boundaries records 1 later change, chiefly involving La Paz. County.
- Is my lot in a flood zone?
- We do not have flood maps for Yuma County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby