Colby, KS Demographics

A map of Colby's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	4,588	4,808	85.2%	86.3%
Hispanic	490	452	9.1%	8.1%
Multiracial	260	154	4.8%	2.8%
Black	31	96	0.6%	1.7%
Native American/Other	18	26	0.3%	0.5%
Asian	0	34	0.0%	0.6%

Colby, Kansas has an estimated population of 5,387, a decrease from the 5,570 recorded in the 2020 Census. The population is 85.2% White, 9.1% Hispanic, 4.8% Multiracial, 0.6% Black, 0.3% Native American/Other, and 0.0% Asian. This demographic dot map shows the population of Colby, with one dot drawn for each person counted by the Census, color-coded by race.

Colby has become more racially diverse since the 2020 Census. It is considerably less diverse than Kansas overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Colby, that probability was 24.7% in 2020 and 26.4% in the most recent ACS estimates.

Colby is ranked the 62nd most populous place in Kansas, out of 740 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). Colby was ranked the 61st most populous place in the 2020 Census.

Colby's White Population

4,588 residents of Colby, or 85.2% of the population, identify as White. The share of White residents in Colby is considerably higher than in Kansas overall, where 72.7% of the population is White. Colby ranks 463rd statewide in terms of White residents as a share of the population, out of 740 places.

Since the 2020 Census, Colby's White population has declined by an estimated 4.6%. White residents' share of Colby's population has decreased from 86.3% to 85.2%.

Colby is more White than neighboring Rexford (82.9% White), and Menlo (66.7% White). Colby is less White than neighboring Levant (100% White), Gem (95.9% White), and Monument (92.9% White).

Colby's Black Population

31 residents of Colby, or 0.6% of the population, identify as Black. The share of Black residents in Colby is slightly lower than in Kansas overall, where 5.2% of the population is Black. Colby ranks 112th statewide in terms of Black residents as a share of the population, out of 740 places.

Since the 2020 Census, Colby's Black population has declined by an estimated 67.7%. Black residents' share of Colby's population has decreased from 1.7% to 0.6%.

Colby is more Black than neighboring Levant (0% Black), Gem (0% Black), Monument (0% Black), Rexford (0% Black), and Menlo (0% Black).

Colby's Asian Population

0 residents of Colby, or 0.0% of the population, identify as Asian. The share of Asian residents in Colby is slightly lower than in Kansas overall, where 2.9% of the population is Asian. Colby ranks 176th statewide in terms of Asian residents as a share of the population, out of 740 places.

Since the 2020 Census, Colby's Asian population has declined by an estimated 100.0%. Asian residents' share of Colby's population has decreased from 0.6% to 0.0%.

Colby is less Asian than neighboring Monument (7.1% Asian), and Menlo (16.7% Asian).

Colby's Hispanic Population

490 residents of Colby, or 9.1% of the population, identify as Hispanic. The share of Hispanic residents in Colby is slightly lower than in Kansas overall, where 13.6% of the population is Hispanic. Colby ranks 156th statewide in terms of Hispanic residents as a share of the population, out of 740 places.

Since the 2020 Census, Colby's Hispanic population has grown by an estimated 8.4%. Hispanic residents' share of Colby's population has increased from 8.1% to 9.1%.

Colby is more Hispanic than neighboring Levant (0% Hispanic), Gem (2% Hispanic), and Monument (0% Hispanic). Colby is less Hispanic than neighboring Rexford (17.1% Hispanic), and Menlo (16.7% Hispanic).

Colby's Native American/Other Population

18 residents of Colby, or 0.3% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Colby is comparable to the share in Kansas overall, where 0.9% of the population is Native American/Other. Colby ranks 444th statewide in terms of Native American/Other residents as a share of the population, out of 740 places.

Since the 2020 Census, Colby's Native American/Other population has declined by an estimated 30.8%. Native American/Other residents' share of Colby's population has remained roughly unchanged at 0.3%.

Colby is more Native American/Other than neighboring Levant (0% Native American/Other), Gem (0% Native American/Other), Monument (0% Native American/Other), Rexford (0% Native American/Other), and Menlo (0% Native American/Other).

Colby's Multiracial Population

260 residents of Colby, or 4.8% of the population, identify as Multiracial. The share of Multiracial residents in Colby is comparable to the share in Kansas overall, where 4.8% of the population is Multiracial. Colby ranks 575th statewide in terms of Multiracial residents as a share of the population, out of 740 places.

Since the 2020 Census, Colby's Multiracial population has grown by an estimated 68.8%. Multiracial residents' share of Colby's population has increased from 2.8% to 4.8%.

Colby is more Multiracial than neighboring Levant (0% Multiracial), Gem (2% Multiracial), Monument (0% Multiracial), Rexford (0% Multiracial), and Menlo (0% 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.