Pima County Demographics

A map of Pima County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	535,175	536,868	50.5%	51.5%
Hispanic	386,110	372,788	36.4%	35.7%
Multiracial	45,898	37,415	4.3%	3.6%
Black	35,505	36,254	3.3%	3.5%
Asian	31,152	29,844	2.9%	2.9%
Native American/Other	26,650	30,264	2.5%	2.9%

Pima County, Arizona has an estimated population of 1,060,490, a slight increase from the 1,043,433 recorded in the 2020 Census. The population is 50.5% White, 36.4% Hispanic, 4.3% Multiracial, 3.3% Black, 2.9% Asian, and 2.5% Native American/Other. This demographic dot map shows the population of Pima County, with one dot drawn for each person counted by the Census, color-coded by race.

Pima is about as racially diverse as it was in the 2020 Census. It is less diverse than Arizona overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Pima County, that probability was 60.4% in 2020 and 60.8% in the most recent ACS estimates.

Pima County is ranked the 2nd most populous county in Arizona, out of 15 counties. Pima County was ranked the 2nd most populous county in the 2020 Census.

Pima County's White Population

535,175 residents of Pima County, or 50.5% of the population, identify as White. The share of White residents in Pima County is slightly lower than in Arizona overall, where 52.6% of the population is White. Pima County ranks 10th statewide in terms of White residents as a share of the population, out of 15 counties.

Since the 2020 Census, Pima County's White population has remained roughly the same. White residents' share of Pima County's population has decreased from 51.5% to 50.5%.

Pima County is more White than neighboring Santa Cruz County (15.3% White). Pima County is less White than neighboring Pinal County (54.9% White), Maricopa County (52.5% White), Gila County (61.4% White), and Cochise County (54.1% White).

Pima County's Black Population

35,505 residents of Pima County, or 3.3% of the population, identify as Black. The share of Black residents in Pima County is comparable to the share in Arizona overall, where 4.4% of the population is Black. Pima County ranks 4th statewide in terms of Black residents as a share of the population, out of 15 counties.

Since the 2020 Census, Pima County's Black population has declined by an estimated 2.1%. Black residents' share of Pima County's population has remained roughly unchanged at 3.3%.

Pima County is more Black than neighboring Santa Cruz County (0.1% Black), Gila County (0.5% Black), and Cochise County (2.9% Black). Pima County is less Black than neighboring Pinal County (5.1% Black), and Maricopa County (5.4% Black).

Pima County's Asian Population

31,152 residents of Pima County, or 2.9% of the population, identify as Asian. The share of Asian residents in Pima County is comparable to the share in Arizona overall, where 3.5% of the population is Asian. Pima County ranks 2nd statewide in terms of Asian residents as a share of the population, out of 15 counties.

Since the 2020 Census, Pima County's Asian population has grown by an estimated 4.4%. Asian residents' share of Pima County's population has remained roughly unchanged at 2.9%.

Pima County is more Asian than neighboring Pinal County (1.6% Asian), Santa Cruz County (0.3% Asian), Gila County (0.8% Asian), and Cochise County (1.9% Asian). Pima County is less Asian than neighboring Maricopa County (4.5% Asian).

Pima County's Hispanic Population

386,110 residents of Pima County, or 36.4% of the population, identify as Hispanic. The share of Hispanic residents in Pima County is slightly higher than in Arizona overall, where 31.4% of the population is Hispanic. Pima County ranks 4th statewide in terms of Hispanic residents as a share of the population, out of 15 counties.

Since the 2020 Census, Pima County's Hispanic population has grown by an estimated 3.6%. Hispanic residents' share of Pima County's population has increased from 35.7% to 36.4%.

Pima County is more Hispanic than neighboring Pinal County (29.8% Hispanic), Maricopa County (31.2% Hispanic), Gila County (18% Hispanic), and Cochise County (34.7% Hispanic). Pima County is less Hispanic than neighboring Santa Cruz County (82.5% Hispanic).

Pima County's Native American/Other Population

26,650 residents of Pima County, or 2.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Pima County is comparable to the share in Arizona overall, where 3.8% of the population is Native American/Other. Pima County ranks 9th statewide in terms of Native American/Other residents as a share of the population, out of 15 counties.

Since the 2020 Census, Pima County's Native American/Other population has declined by an estimated 11.9%. Native American/Other residents' share of Pima County's population has remained roughly unchanged at 2.5%.

Pima County is more Native American/Other than neighboring Santa Cruz County (0.6% Native American/Other), Maricopa County (1.9% Native American/Other), and Cochise County (1.3% Native American/Other). Pima County is less Native American/Other than neighboring Pinal County (4.2% Native American/Other), and Gila County (9.5% Native American/Other).

Pima County's Multiracial Population

45,898 residents of Pima County, or 4.3% of the population, identify as Multiracial. The share of Multiracial residents in Pima County is comparable to the share in Arizona overall, where 4.4% of the population is Multiracial. Pima County ranks 8th statewide in terms of Multiracial residents as a share of the population, out of 15 counties.

Since the 2020 Census, Pima County's Multiracial population has grown by an estimated 22.7%. Multiracial residents' share of Pima County's population has increased from 3.6% to 4.3%.

Pima County is more Multiracial than neighboring Santa Cruz County (1.2% Multiracial). Pima County is less Multiracial than neighboring Maricopa County (4.5% Multiracial), Gila County (9.8% Multiracial), and Cochise County (5.2% Multiracial).

Sources: Most recent population estimates are from the 2020-2024 American Community Survey 5-Year Estimates. 2020 population counts and map data are from 2020 Census State Redistricting Data. Geographic data are from Census TIGER/Line Shapefiles.