Summit is a census-designated place (CDP) in Pima County, Arizona, United States. The population was 3,702 at the 2000 census.

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Summit, Arizona
CDP
An old adobe ranch house in Summit.
Location in Pima County and the state of Arizona
Summit, Arizona Location in the United States
Coordinates: 32°3′48″N 110°56′37″W
Country	United States
State	Arizona
County	Pima
Area [1]
• Total	3.66 sq mi (9.48 km2)
• Land	3.66 sq mi (9.48 km2)
• Water	0.00 sq mi (0.00 km2)
Elevation	2,621 ft (799 m)
Population  (2020)
• Total	4,724
• Density	1,291.06/sq mi (498.47/km2)
Time zone	UTC-7 (MST (no DST))
FIPS code	04-70240
GNIS feature ID	1853167

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According to the United States Census Bureau, the CDP has a total area of 10.1 square miles (26 km²), all land.

At the 2000 census there were 3,702 people, 1,144 households, and 871 families living in the CDP. The population density was 365.8 inhabitants per square mile (141.2/km²). There were 1,259 housing units at an average density of 124.4 per square mile (48.0/km²). The racial makeup of the CDP was 65.9% White, 0.5% Black or African American, 2.2% Native American, 0.1% Asian, <0.1% Pacific Islander, 26.0% from other races, and 5.3% from two or more races. 63.5% of the population were Hispanic or Latino of any race.^[3] Of the 1,144 households 46.7% had children under the age of 18 living with them, 55.6% were married couples living together, 13.4% had a female householder with no husband present, and 23.8% were non-families. 18.4% of households were one person and 5.9% were one person aged 65 or older. The average household size was 3.24 and the average family size was 3.68.

The age distribution was 34.8% under the age of 18, 10.0% from 18 to 24, 29.8% from 25 to 44, 18.4% from 45 to 64, and 6.9% 65 or older. The median age was 29 years. For every 100 females, there were 107.3 males. For every 100 females age 18 and over, there were 103.7 males.

The median household income was $28,485 and the median family income was $31,806. Males had a median income of $21,316 versus $21,333 for females. The per capita income for the CDP was $11,274. About 22.0% of families and 26.2% of the population were below the poverty line, including 42.9% of those under age 18 and 9.0% of those age 65 or over.