kids encyclopedia robot

Pima County, Arizona facts for kids

Kids Encyclopedia Facts
Quick facts for kids
Pima County
Pima County Courthouse
Pima County Courthouse
Official seal of Pima County
Seal
Map of Arizona highlighting Pima County
Location within the U.S. state of Arizona
Map of the United States highlighting Arizona
Arizona's location within the U.S.
Country  United States
State  Arizona
Founded November 9, 1864
Named for Pima people
Seat Tucson
Largest city Tucson
Area
 • Total 9,189 sq mi (23,800 km2)
 • Land 9,187 sq mi (23,790 km2)
 • Water 2.1 sq mi (5 km2)  0.02%%
Population
 (2020)
 • Total 1,043,433
 • Estimate 
(2023)
1,063,162 Increase
 • Density 113.552/sq mi (43.8428/km2)
Time zone UTC−7 (Mountain)
Congressional districts 6th, 7th
Pima County Fair
Pima County Fair, 2007

Pima County is a large county in the south central part of Arizona, a state in the United States. As of 2020, over 1 million people live here, making it the second most populated county in Arizona.

The main city and county seat is Tucson. Most people in Pima County live in or near Tucson. The county is named after the Pima people, also known as Tohono Oʼodham, who are Native Americans originally from this area.

Pima County is home to parts of the Tohono O'odham Nation and all of the San Xavier Indian Reservation and Pascua Yaqui Indian Reservation. It also includes beautiful natural areas like Organ Pipe Cactus National Monument, Ironwood Forest National Monument, and Saguaro National Park.

Besides Tucson, other important towns include Marana, Oro Valley, Sahuarita, South Tucson, and Green Valley. In the western part of the county, you'll find Sells, which is the capital of the Tohono O'odham Nation, and Ajo.

History of Pima County

Pima County is one of Arizona's four original counties. It was created on November 9, 1864. The land for the county became part of the United States in 1853 through something called the Gadsden Purchase from Mexico.

Originally, Pima County was much larger. Over time, other counties like Cochise, Graham, and Santa Cruz were formed from parts of Pima County.

Geography of Pima County

Pima County covers a huge area of about 9,189 square miles. Most of this is land, with only a tiny bit being water.

Mountains and Canyons

Pima County has many interesting land features, including:

Main Roads

Here are some of the major highways that run through Pima County:

Neighboring Areas

Pima County shares borders with several other counties in Arizona and even parts of Mexico:

Protected Natural Areas

Pima County is home to many important natural areas that are protected:

Pima County Historic Courthouse
Old Pima County Courthouse

Sonoran Desert Conservation Plan

Pima County has a special plan called the Sonoran Desert Conservation Plan (SDCP). This plan helps protect the desert's natural and cultural resources. It also works to keep ranches, protect endangered animals, and create safe paths for wildlife.

People of Pima County

Historical population
Census Pop.
1870 5,716
1880 17,006 197.5%
1890 12,673 −25.5%
1900 14,689 15.9%
1910 22,818 55.3%
1920 34,680 52.0%
1930 55,676 60.5%
1940 72,838 30.8%
1950 141,216 93.9%
1960 265,660 88.1%
1970 351,667 32.4%
1980 531,443 51.1%
1990 666,880 25.5%
2000 843,746 26.5%
2010 980,263 16.2%
2020 1,043,433 6.4%
2023 (est.) 1,063,162 8.5%
U.S. Decennial Census
1790–1960 1900–1990
1990–2000 2010–2020

In 2010, there were about 980,263 people living in Pima County. By 2020, this number grew to 1,043,433 people. The county continues to grow, with an estimated population of over 1,063,162 in 2023.

About 34.6% of the people in Pima County are of Hispanic or Latino background. The average age of people living here is about 37.7 years old.

Cities and Towns in Pima County

Pima County Incorporated and Unincorporated areas
Map of the cities and towns in Pima County. It also shows the borders for the Indian Reservations.
Pima Co. Copper mines
Astronaut photo of the open-pit copper mines near Green Valley, 2010. North is to the left.

Pima County has several cities, towns, and other communities.

Cities

Towns

Census-Designated Places (CDPs)

CDPs are areas that look like towns but are not officially governed as cities or towns.

Native American Communities

Other Communities

Ghost Towns

Ghost towns are places that used to be populated but are now mostly abandoned.

Biggest Communities by Population

This table shows the largest cities and towns in Pima County based on the 2010 census.

Rank City/Town/etc. Population (2010 Census) Type of Community Year Founded
1 Tucson 520,116 City 1775
2 Casas Adobes 66,795 CDP
3 Catalina Foothills 50,796 CDP
4 Oro Valley 41,011 Town 1974
5 Marana 34,961 Town 1977
6 Drexel Heights 27,749 CDP
7 Sahuarita 25,259 Town 1994
8 Green Valley 21,391 CDP
9 Tanque Verde 16,901 CDP
10 Flowing Wells 16,419 CDP
11 Tucson Estates 12,192 CDP
12 Vail 10,208 CDP
13 Picture Rocks 9,563 CDP
14 Valencia West 9,355 CDP
15 Catalina 7,569 CDP
16 Avra Valley 6,050 CDP
17 Corona de Tucson 5,675 CDP
18 South Tucson 5,652 City 1940
19 Three Points 5,581 CDP
20 Summit 5,372 CDP
21 Rincon Valley 5,139 CDP
22 Ajo 3,304 CDP
23 Sells 2,495 CDP
24 Arivaca Junction 1,090 CDP
25 Littletown 873 CDP
26 Arivaca 695 CDP
27 Santa Rosa 628 CDP
28 Elephant Head 612 CDP
29 Kleindale 500 CDP
30 Pisinemo 321 CDP
31 Topawa 299 CDP
32 Nelson 259 CDP
33 San Miguel 197 CDP
34 Gu Oidak 188 CDP
35 Why 167 CDP
36 Ali Chuk 161 CDP
37 Maish Vaya 158 CDP
38 Anegam 151 CDP
39 Cowlic 135 CDP
40 Ali Chukson 132 CDP
41 Wahak Hotrontk 114 CDP
42 South Komelik 111 CDP
43 Rillito 97 CDP
44 Haivana Nakya 96 CDP
45 Chiawuli Tak 78 CDP
46 Ali Molina 71 CDP
47 Charco 52 CDP
48 Ventana 49 CDP
49 Ko Vaya 46 CDP
50 Summerhaven 40 CDP
51 Nolic 37 CDP
52 Ak Chin 30 CDP
53 J-Six Ranchettes 20 CDP
54 Comobabi 8 CDP
55 Willow Canyon 1 CDP

Education in Pima County

Many school districts serve the students of Pima County. Some districts cover all grade levels (unified), while others focus on elementary school.

Unified School Districts

These districts offer education from elementary to high school:

  • Ajo Unified School District
  • Amphitheater Unified School District
  • Catalina Foothills Unified School District
  • Flowing Wells Unified School District
  • Indian Oasis-Baboquivari Unified School District
  • Marana Unified School District
  • Sahuarita Unified School District
  • Sunnyside Unified School District
  • Tanque Verde Unified School District
  • Tucson Unified School District
  • Vail Unified School District

Elementary School Districts

These districts focus on younger students:

  • Altar Valley Elementary School District
  • Continental Elementary School District
  • Empire Elementary School District
  • Redington Elementary School District
  • San Fernando Elementary School District

The Arizona State Schools for the Deaf and Blind is also located in Tucson.

Fun Things to Do in Pima County

Yearly Events

  • Pima County Fair
  • Tucson Gem and Mineral Show
  • Tucson Rodeo

Places to Visit

Historic Landmarks

Pima County has officially recognized several places as historic landmarks:

  • Ferguson House, Hacienda Del Bosquito, Desert Treasures (Designated 2018)
  • Harrenstein House (Designated 2018)
  • Viewpoint, Christina and Earl J. Johnson House (Designated 2021)
  • Jacobson House (Designated 2022)

See also

Kids robot.svg In Spanish: Condado de Pima para niños

kids search engine
Pima County, Arizona Facts for Kids. Kiddle Encyclopedia.