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About Maricopa County

Maricopa County includes Arizona’s capital city, Phoenix, and much of the populous areas surrounding it. The population was 3,817,117 at the 2010 census, which placed it as the fourth most populous county in the United States. It also has a large land area, 9,224 square miles. Desert climates cover the county. Saguaro and cholla cactus are common, along with creosote bushes, and many other exotic desert plants. The Sonoran Desert covers the southwest portion of the county, and the Mogollon Rim lines the northeast corner.

The empty desert lands and warm climates have invited a huge influx of population, and Phoenix and its suburbs have grown exponentially for decades. Three of the ten fastest growing towns in America were in Maricopa County. But beyond the reach of the city, there are still many miles of empty desert.

The Gila River is the major river in Maricopa County, entering from the southeast, flowing towards the center of the county, and then taking a turn to the south. Its sources lie in Black Mountains in New Mexico. Irrigation water from the river is in high demand, along with the domestics needs of millions of people, and it flows intermittently once it reaches the valley south of Phoenix. Only a small portion of its historic flow reaches the Colorado River today. The lowest point in Maricopa County is where it exits the county, at about 425 feet. The Salt River and Agua Fria Rivers join it near Phoenix.

Numerous minor mountain ranges are included in Maricopa County. The The Harquahala Mountains reach above 5,000 feet on the west boundary. The Estrella Mountains reach to about 4,300 feet south of Phoenix, and the White Tank Mountains reach above 4,000 feet, just west of Phoenix. These mountains may look barren at a distance, but are usually covered with cactus, especially saguaro, cholla and jumping cholla. The highest point in Maricopa County is probably Browns Peak, at 7,657 feet, on the Mogollon Rim, shared with Gila County, to the east.

Interstate 10 heads west out of Phoenix towards California, and southeast towards the Tucson area. Interstate 17 heads north to Flagstaff. U.S. Highway 60 comes down the Mogollon Rim into Phoenix, and then heads into the northwest corner of the county. U.S. Highway 70 also enters the county from the east and terminates at a junction with Highway 60. U.S. Highway 80 also used to cross the county, as well as U.S. 89, but both have been replaced by freeways. Many other highways and roads access the area.

Street Index

316th Avenue
319th Avenue
327th Avenue
331st Avenue
333rd Avenue
335th Avenue
337th Avenue
339th Avenue
349th Avenue
351st Avenue
353rd Avenue
355th Avenue
363rd Avenue
365th Avenue
367th Avenue
371st Avenue
375th Avenue
385th Drive
393rd Drive
395th Avenue
397th Avenue
411th Avenue
427th Avenue
485th Avenue
487th Avenue
491st Avenue
988th Avenue
a dirt road
a road
Agua Caliente Road
Arlington Canal Road
Arlington School Road
Baseline Road
Buckeye Road
Cactus Rose Road
Courthouse Road
Desert Rose Road
Eagle Eye Road
Enterprise Road
Fornes Road
Gila Bend Air Force Road
Harquahala Valley Road
Indian School Road
Interstate 10
Lower Buckeye Road
Luke Wash
Old Highway 80
Patterson Road
Pier Point Road
Rainbow Wash
Salome Highway
State Highway 85
Ward Road
Watermelon Street
Winter's Wash
Wintersburg Road
Woods Road

In Maricopa County:

2,453 Photographs

Maricopa County is in:



  • Buckeye
  • Gila Bend
  • Mesa
  • Phoenix
  • Scottsdale
  • Tempe
  • Wickenburg