Longmont, CO Demographics

A map of Longmont's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	66,278	64,916	66.7%	65.6%
Hispanic	23,848	24,457	24.0%	24.7%
Multiracial	4,658	4,096	4.7%	4.1%
Asian	3,317	3,490	3.3%	3.5%
Black	759	900	0.8%	0.9%
Native American/Other	546	1,026	0.5%	1.0%

Longmont, Colorado has an estimated population of 99,406, a less than 1% change from the 98,885 recorded in the 2020 Census. The population is 66.7% White, 24.0% Hispanic, 4.7% Multiracial, 3.3% Asian, 0.8% Black, and 0.5% Native American/Other. This demographic dot map shows the population of Longmont, with one dot drawn for each person counted by the Census, color-coded by race.

Longmont has become less racially diverse since the 2020 Census. It is 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 Longmont, that probability was 50.5% in 2020 and 49.5% in the most recent ACS estimates.

Longmont is ranked the 14th most populous place in Colorado, out of 482 places. This ranking is based on the Census definition of a place, which includes incorporated places like cities, towns, and villages, as well as unincorporated census-designated places (CDPs). Longmont was ranked the 14th most populous place in the 2020 Census.

Longmont's White Population

66,278 residents of Longmont, or 66.7% of the population, identify as White. The share of White residents in Longmont is comparable to the share in Colorado overall, where 64.8% of the population is White. Longmont ranks 359th statewide in terms of White residents as a share of the population, out of 482 places.

Since the 2020 Census, Longmont's White population has grown by an estimated 2.1%. White residents' share of Longmont's population has increased from 65.6% to 66.7%.

Longmont is more White than neighboring Leyner (0% White). Longmont is less White than neighboring Niwot (86.8% White), Mead (69.8% White), Gunbarrel (80.9% White), and Erie (77.2% White).

Longmont's Black Population

759 residents of Longmont, or 0.8% of the population, identify as Black. The share of Black residents in Longmont is slightly lower than in Colorado overall, where 3.8% of the population is Black. Longmont ranks 138th statewide in terms of Black residents as a share of the population, out of 482 places.

Since the 2020 Census, Longmont's Black population has declined by an estimated 15.7%. Black residents' share of Longmont's population has remained roughly unchanged at 0.8%.

Longmont is more Black than neighboring Niwot (0% Black), Leyner (0% Black), Mead (0% Black), Gunbarrel (0.2% Black), and Erie (0.2% Black).

Longmont's Asian Population

3,317 residents of Longmont, or 3.3% of the population, identify as Asian. The share of Asian residents in Longmont is comparable to the share in Colorado overall, where 3.2% of the population is Asian. Longmont ranks 51st statewide in terms of Asian residents as a share of the population, out of 482 places.

Since the 2020 Census, Longmont's Asian population has declined by an estimated 5.0%. Asian residents' share of Longmont's population has remained roughly unchanged at 3.3%.

Longmont is more Asian than neighboring Leyner (0% Asian), and Mead (2% Asian). Longmont is less Asian than neighboring Niwot (4.2% Asian), Gunbarrel (4.7% Asian), and Erie (6.1% Asian).

Longmont's Hispanic Population

23,848 residents of Longmont, or 24.0% of the population, identify as Hispanic. The share of Hispanic residents in Longmont is comparable to the share in Colorado overall, where 22.5% of the population is Hispanic. Longmont ranks 124th statewide in terms of Hispanic residents as a share of the population, out of 482 places.

Since the 2020 Census, Longmont's Hispanic population has declined by an estimated 2.5%. Hispanic residents' share of Longmont's population has decreased from 24.7% to 24.0%.

Longmont is more Hispanic than neighboring Niwot (5.5% Hispanic), Leyner (0% Hispanic), Gunbarrel (5.4% Hispanic), and Erie (10.4% Hispanic). Longmont is less Hispanic than neighboring Mead (25.9% Hispanic).

Longmont's Native American/Other Population

546 residents of Longmont, or 0.5% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Longmont is comparable to the share in Colorado overall, where 1% of the population is Native American/Other. Longmont ranks 225th statewide in terms of Native American/Other residents as a share of the population, out of 482 places.

Since the 2020 Census, Longmont's Native American/Other population has declined by an estimated 46.8%. Native American/Other residents' share of Longmont's population has decreased from 1.0% to 0.5%.

Longmont is more Native American/Other than neighboring Leyner (0% Native American/Other), and Mead (0% Native American/Other). Longmont is less Native American/Other than neighboring Niwot (1% Native American/Other), and Gunbarrel (0.7% Native American/Other).

Longmont's Multiracial Population

4,658 residents of Longmont, or 4.7% of the population, identify as Multiracial. The share of Multiracial residents in Longmont is comparable to the share in Colorado overall, where 4.6% of the population is Multiracial. Longmont ranks 236th statewide in terms of Multiracial residents as a share of the population, out of 482 places.

Since the 2020 Census, Longmont's Multiracial population has grown by an estimated 13.7%. Multiracial residents' share of Longmont's population has increased from 4.1% to 4.7%.

Longmont is more Multiracial than neighboring Niwot (2.5% Multiracial), Leyner (0% Multiracial), and Mead (2.2% Multiracial). Longmont is less Multiracial than neighboring Gunbarrel (8.1% Multiracial), and Erie (5.7% 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.