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County · code 04019

Pima CountyArizona

Pima County is in Arizona, with its county seat in Tucson. It was created on November 10, 1864, as one of four original counties in Arizona Territory and named after the Akimel O'odham people.

  • Founded1864
  • County seatTucson
  • Named forAkimel O'odham
  • Land area9,189 sq mi + 2 sq mi water
  • Population1,043,433 2020 Census
  • Parcels mapped448,514 checked 16 October 2026
Open the free map Click any parcel in Pima County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

PinalSanta CruzMaricopaCochiseGrahamYuma Tucson Census outline · seat marked

Where it is

Pima on the map of Arizona

Arizona has 15 counties and county equivalents, each with its own records office. Shapes with a page are links.

Apache CountyCochise CountyCoconino CountyGila CountyGraham CountyGreenlee CountyLa Paz CountyMaricopa CountyMohave CountyNavajo CountyPinal CountySanta Cruz CountyYavapai CountyYuma CountyPima County Pima
Counties of Arizona · Pima highlighted

History

Founded in 1864

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

Pima County was created on November 10, 1864, as one of four original counties in Arizona Territory. Over the following decades, the county lost territory to the creation of neighboring counties: Maricopa in 1873 and 1877, Pinal in 1875, Cochise in 1881, Graham in 1881, and Santa Cruz in 1899.

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

  1. 1864
    Pima County created Pima created as one of four original counties in Arizona Territory. · Howell Code, Ariz. Terr. Laws 1864, 1st assy., ch. 2/ pp. 24-25
  2. 1873
    Lost territory Pima lost to Maricopa.
    to Maricopa
    · Ariz. Terr. Laws 1873, 7th assy./ p. 87
  3. 1875
    Lost territory Pima lost to creation of Pinal and was divided into two parts until 9 February 1877.
    to Pinal
    · Ariz. Terr. Laws 1875, 8th assy./ pp. 19-20
  4. 1877
    Lost territory Pima lost to Pinal. Area lost was the part of Pima that had been separated from main body of the county on 1 February 1875.
    to Pinal
    · Ariz. Terr. Laws 1877, 9th assy./ pp.108-109
  5. 1881
    Lost territory Pima lost to creation of Cochise.
    to Cochise
    · Ariz. Terr. Laws 1881, 11th assy./ pp. 4-7
Show all 9 changes (4 more)
  1. 1864
    Pima County created Pima created as one of four original counties in Arizona Territory. · Howell Code, Ariz. Terr. Laws 1864, 1st assy., ch. 2/ pp. 24-25
  2. 1873
    Lost territory Pima lost to Maricopa.
    to Maricopa
    · Ariz. Terr. Laws 1873, 7th assy./ p. 87
  3. 1875
    Lost territory Pima lost to creation of Pinal and was divided into two parts until 9 February 1877.
    to Pinal
    · Ariz. Terr. Laws 1875, 8th assy./ pp. 19-20
  4. 1877
    Gained territory Pima gained a small area along the Gila River from Maricopa.
    from Maricopa
    · Ariz. Terr. Laws 1877, 9th assy./ pp. 12-13
  5. 1877
    Lost territory Pima lost to Pinal. Area lost was the part of Pima that had been separated from main body of the county on 1 February 1875.
    to Pinal
    · Ariz. Terr. Laws 1877, 9th assy./ pp.108-109
  6. 1881
    Lost territory Pima lost to creation of Cochise.
    to Cochise
    · Ariz. Terr. Laws 1881, 11th assy./ pp. 4-7
  7. 1881
    Lost territory Pima lost to creation of Graham.
    to Graham
    · Ariz. Terr. Laws 1881, 11th assy./ pp. 155-157
  8. 1899
    Lost territory Pima lost to creation of Santa Cruz.
    to Santa Cruz
    · Ariz. Terr. Laws 1899, 20th assy./ pp. 49-57
  9. 1973
    Boundary clarified Pima boundaries redefined (no change).
    no change
    · Ariz. Laws 1973, 31st leg., 1st reg. sess., ch. 101/ pp. 596-597

Land and parcels

What the maps cover in Pima

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

Pima by the Census

Population
1,043,433 2020 Census count
Housing units
470,132 2020 Census count
Land area
9,189 square miles
Water area
2 square miles
People per sq mi
114 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

Pima 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 Pima County

When was Pima County founded?
Pima County was founded in 1864, and named after Akimel O'odham.
What is the county seat of Pima County?
The county seat of Pima County is Tucson.
Is there an online parcel map for Pima County?
Yes. Pima County publishes a parcel map of 448,514 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Pima County's boundary or name changed?
Pima County was created in 1864. Since then the Atlas of Historical County Boundaries records 7 later changes, chiefly involving Maricopa County, Pinal County and Cochise County.
Is my lot in a flood zone?
We do not have flood maps for Pima 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