- county
- FIPS 04013
- Largest town: Phoenix
Maricopa County, Arizona
Maricopa County had 4,673,096 residents in the Census Vintage 2024 estimate, on 9,202.0 square miles of land. It is the most populous of Arizona's 15 county-equivalents.
- Population
- 4,673,096
- #1 of 15 in Arizona · #4 in US
- Area
- 9,202.0 sq mi
- #5 of 15 in Arizona · #28 in US
- Density
- 508 / sq mi
- #1 of 15 in Arizona · #278 in US
- Median household income
- $86,973
- #1 of 15 in Arizona · #287 in US
Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area
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Maricopa County population, land area and income
Maricopa County had 4,673,096 residents in the Census Vintage 2024 estimate, on 9,202.0 square miles of land. It is the most populous of Arizona's 15 county-equivalents. That works out to 507.8 people per square mile, 5.3 times the US average of 96.3, and in the top tenth nationally.
The median county-equivalent in Arizona has 125,773 residents, so Maricopa County is 37.2 times that size.
Its SAIPE 2023 median household income of $86,973 is in the top tenth among 3,143 counties with an estimate.
National rank among 3,144
Population
4,673,096
4th of 3,144 (US)
Land area
9,202 sq mi
28th of 3,144 (US)
Density
507.8 / sq mi
278th of 3,144 (US)
Median household income
$86,973
287th of 3,143 (US)
Rank within Arizona (15)
Population
4,673,096
1st of 15 (AZ)
Land area
9,202 sq mi
5th of 15 (AZ)
Density
507.8 / sq mi
1st of 15 (AZ)
Median household income
$86,973
1st of 15 (AZ)
How Maricopa County's population changed since 2020
Maricopa County gained 227,681 residents between the July 2020 and July 2024 estimates, a rise of 5.1%. That ranks 6th of 15 in Arizona for growth. The median Arizona county changed by +3.3%, and the state as a whole by +5.5%.
Since the April 2020 estimates base, Maricopa County recorded 213,098 births and 172,269 deaths, a natural change of +40,829. Net international migration added +112,086 and net domestic migration, people moving to or from other US counties, came to +95,202. The largest single component was international migration, which added 112,086 people.
Components of change, April 2020 to July 2024
- Births
- 213,098
- Deaths
- 172,269
- Net international migration
- +112,086
- Net domestic migration
- +95,202
- Change, July 2023 to July 2024
- +57,471
Where Maricopa County is
The Census internal point of Maricopa County is at 33.345200, -112.498900. It sits in UTM zone 12N. The map shades Arizona's 15 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Maricopa County outlined. Dots are towns of 1,000+ people with residents in it.
- < -0.0%
- < +2.5%
- < +4.2%
- < +5.9%
- ≥ +5.9%
Orange pin: Maricopa County internal point. Dark pin: Phoenix.
Internal point
- Decimal
- 33.345200, -112.498900
- DMS
- 33°20'42.72"N 112°29'56.04"W
- UTM
- 12N 360520.5E 3690559.9N
- Geohash
- 9tbj8n2cc
- Plus code
- 85598GW2+3C
Towns in Maricopa County
25 incorporated places of 1,000+ people have residents in Maricopa County, 4,340,402 people together, or 93% of the county. Each figure counts only the part of the town inside Maricopa County; towns marked "part" extend into another county. The largest is Phoenix with 1,673,164.
- 01Phoenix1,673,164
- 02Mesa517,151
- 03Gilbert288,790
- 04Chandler281,231
- 05Glendale258,143
- 06Scottsdale246,170
- 07Peoria199,924
- 08Tempe190,114
- 09Surprise167,564
- 10Goodyear118,186
- 11Buckeye114,334
- 12Avondale96,609
- 13Queen Creek (part)70,100
- 14El Mirage36,468
- 15Fountain Hills23,696
Counties bordering Maricopa County
The Census 2024 county adjacency file lists 6 neighbors for Maricopa County. The most populous is Pima County, AZ, with 1,080,149 residents. Distances run between Census internal points in a straight line.
Distance to Phoenix and the nearest big city
Phoenix is 25.5 miles ENE of Maricopa County's internal point in a straight line. The nearest place of 100,000 or more is Goodyear, AZ (population 118,186), 9.9 miles away.
Maricopa County FIPS code
The FIPS code of Maricopa County is 04013: state code 04 for Arizona plus county code 013. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $86,973.
Questions people ask
What is the population of Maricopa County, Arizona?
The Census Vintage 2024 estimate for July 1, 2024 is 4,673,096. That is up 227,681 people (5.1%) from the July 2020 estimate of 4,445,415.
What is the FIPS code of Maricopa County?
04013. The first two digits (04) are Arizona; the last three (013) identify the county.
What is the largest town in Maricopa County?
Phoenix, with 1,673,164 residents inside Maricopa County in 2024.
Which counties border Maricopa County?
6 county-equivalents border it in the Census 2024 adjacency file: Pima County, AZ; Pinal County, AZ; Yavapai County, AZ; Yuma County, AZ; Gila County, AZ; La Paz County, AZ.
Sources and data as of
Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.
- 01Census Vintage 2024 county population estimates
- 02Census 2024 Gazetteer, counties
- 03Census SAIPE 2023 state and county estimates
- 04Census Vintage 2024 subcounty population estimates
- 05Census 2024 county adjacency file
- 06Census 2024 cartographic boundary file, counties (1:5,000,000)
How every number is computed: methodology. Spotted a wrong figure? Report an error.