Summit County Demographics

A map of Summit County's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	23,093	23,782	74.5%	76.6%
Hispanic	5,334	5,335	17.2%	17.2%
Multiracial	1,753	1,062	5.7%	3.4%
Asian	453	407	1.5%	1.3%
Native American/Other	255	237	0.8%	0.8%
Black	129	232	0.4%	0.7%

Summit County, Colorado has an estimated population of 31,017, a less than 1% change from the 31,055 recorded in the 2020 Census. The population is 74.5% White, 17.2% Hispanic, 5.7% Multiracial, 1.5% Asian, 0.8% Native American/Other, and 0.4% Black. This demographic dot map shows the population of Summit County, with one dot drawn for each person counted by the Census, color-coded by race.

Summit has become more racially diverse since the 2020 Census. It is considerably less diverse than Colorado overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Summit County, that probability was 38.3% in 2020 and 41.3% in the most recent ACS estimates.

Summit County is ranked the 19th most populous county in Colorado, out of 64 counties. Summit County was ranked the 19th most populous county in the 2020 Census.

Summit County's White Population

23,093 residents of Summit County, or 74.5% of the population, identify as White. The share of White residents in Summit County is higher than in Colorado overall, where 64.8% of the population is White. Summit County ranks 31st statewide in terms of White residents as a share of the population, out of 64 counties.

Since the 2020 Census, Summit County's White population has declined by an estimated 2.9%. White residents' share of Summit County's population has decreased from 76.6% to 74.5%.

Summit County is more White than neighboring Lake County (58.3% White), and Eagle County (62.2% White). Summit County is less White than neighboring Grand County (76.8% White), Clear Creek County (85.8% White), and Gilpin County (84.8% White).

Summit County's Black Population

129 residents of Summit County, or 0.4% of the population, identify as Black. The share of Black residents in Summit County is slightly lower than in Colorado overall, where 3.8% of the population is Black. Summit County ranks 25th statewide in terms of Black residents as a share of the population, out of 64 counties.

Since the 2020 Census, Summit County's Black population has declined by an estimated 44.4%. Black residents' share of Summit County's population has remained roughly unchanged at 0.4%.

Summit County is more Black than neighboring Grand County (0.2% Black), Clear Creek County (0.1% Black), and Lake County (0.1% Black). Summit County is less Black than neighboring Eagle County (0.6% Black), and Gilpin County (2.6% Black).

Summit County's Asian Population

453 residents of Summit County, or 1.5% of the population, identify as Asian. The share of Asian residents in Summit County is comparable to the share in Colorado overall, where 3.2% of the population is Asian. Summit County ranks 14th statewide in terms of Asian residents as a share of the population, out of 64 counties.

Since the 2020 Census, Summit County's Asian population has grown by an estimated 11.3%. Asian residents' share of Summit County's population has remained roughly unchanged at 1.5%.

Summit County is more Asian than neighboring Grand County (0.7% Asian), Lake County (0.1% Asian), and Gilpin County (1.1% Asian). Summit County is less Asian than neighboring Clear Creek County (1.8% Asian).

Summit County's Hispanic Population

5,334 residents of Summit County, or 17.2% of the population, identify as Hispanic. The share of Hispanic residents in Summit County is lower than in Colorado overall, where 22.5% of the population is Hispanic. Summit County ranks 26th statewide in terms of Hispanic residents as a share of the population, out of 64 counties.

Since the 2020 Census, Summit County's Hispanic population has remained roughly the same. Hispanic residents' share of Summit County's population has remained roughly unchanged at 17.2%.

Summit County is more Hispanic than neighboring Grand County (10.2% Hispanic), Clear Creek County (7.8% Hispanic), and Gilpin County (7.4% Hispanic). Summit County is less Hispanic than neighboring Lake County (32.8% Hispanic), and Eagle County (30.4% Hispanic).

Summit County's Native American/Other Population

255 residents of Summit County, or 0.8% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Summit County is comparable to the share in Colorado overall, where 1% of the population is Native American/Other. Summit County ranks 55th statewide in terms of Native American/Other residents as a share of the population, out of 64 counties.

Since the 2020 Census, Summit County's Native American/Other population has grown by an estimated 7.6%. Native American/Other residents' share of Summit County's population has remained roughly unchanged at 0.8%.

Summit County is more Native American/Other than neighboring Eagle County (0.6% Native American/Other). Summit County is less Native American/Other than neighboring Grand County (2.1% Native American/Other), Clear Creek County (1.5% Native American/Other), Lake County (0.9% Native American/Other), and Gilpin County (1.2% Native American/Other).

Summit County's Multiracial Population

1,753 residents of Summit County, or 5.7% of the population, identify as Multiracial. The share of Multiracial residents in Summit County is comparable to the share in Colorado overall, where 4.6% of the population is Multiracial. Summit County ranks 46th statewide in terms of Multiracial residents as a share of the population, out of 64 counties.

Since the 2020 Census, Summit County's Multiracial population has grown by an estimated 65.1%. Multiracial residents' share of Summit County's population has increased from 3.4% to 5.7%.

Summit County is more Multiracial than neighboring Clear Creek County (3% Multiracial), Eagle County (4.7% Multiracial), and Gilpin County (3% Multiracial). Summit County is less Multiracial than neighboring Grand County (10.1% Multiracial), and Lake County (7.7% 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.