Waterloo, WI Demographics

A map of Waterloo's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	3,002	2,702	83.4%	77.4%
Hispanic	586	609	16.3%	17.4%
Multiracial	12	93	0.3%	2.7%
Black	0	50	0.0%	1.4%
Asian	0	21	0.0%	0.6%
Native American/Other	0	17	0.0%	0.5%

Waterloo, Wisconsin has an estimated population of 3,600, an increase from the 3,492 recorded in the 2020 Census. The population is 83.4% White, 16.3% Hispanic, 0.3% Multiracial, 0.0% Black, 0.0% Asian, and 0.0% Native American/Other. This demographic dot map shows the population of Waterloo, with one dot drawn for each person counted by the Census, color-coded by race.

Waterloo has become considerably less racially diverse since the 2020 Census. It is considerably less diverse than Wisconsin overall. Demographers use a diversity index to measure the probability that two randomly selected individuals belong to different racial or ethnic groups. In Waterloo, that probability was 37.0% in 2020 and 27.8% in the most recent ACS estimates.

Waterloo is ranked the 193rd most populous place in Wisconsin, out of 808 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). Waterloo was ranked the 193rd most populous place in the 2020 Census.

Waterloo's White Population

3,002 residents of Waterloo, or 83.4% of the population, identify as White. The share of White residents in Waterloo is slightly higher than in Wisconsin overall, where 78.6% of the population is White. Waterloo ranks 724th statewide in terms of White residents as a share of the population, out of 808 places.

Since the 2020 Census, Waterloo's White population has grown by an estimated 11.1%. White residents' share of Waterloo's population has increased from 77.4% to 83.4%.

Waterloo is more White than neighboring Deerfield (74.3% White). Waterloo is less White than neighboring Lake Mills (87.9% White), Columbus (90.3% White), and Lake Ripley (90.7% White).

Waterloo's Black Population

0 residents of Waterloo, or 0.0% of the population, identify as Black. The share of Black residents in Waterloo is lower than in Wisconsin overall, where 5.9% of the population is Black. Waterloo ranks 121st statewide in terms of Black residents as a share of the population, out of 808 places.

Since the 2020 Census, Waterloo's Black population has declined by an estimated 100.0%. Black residents' share of Waterloo's population has decreased from 1.4% to 0.0%.

Waterloo is less Black than neighboring Marshall (4% Black), Lake Mills (1% Black), Columbus (2% Black), Deerfield (3.6% Black), and Lake Ripley (1.3% Black).

Waterloo's Asian Population

0 residents of Waterloo, or 0.0% of the population, identify as Asian. The share of Asian residents in Waterloo is slightly lower than in Wisconsin overall, where 2.9% of the population is Asian. Waterloo ranks 341st statewide in terms of Asian residents as a share of the population, out of 808 places.

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

Waterloo is less Asian than neighboring Marshall (3.2% Asian), Lake Mills (0.5% Asian), Columbus (0.3% Asian), and Deerfield (4.3% Asian).

Waterloo's Hispanic Population

586 residents of Waterloo, or 16.3% of the population, identify as Hispanic. The share of Hispanic residents in Waterloo is higher than in Wisconsin overall, where 8% of the population is Hispanic. Waterloo ranks 29th statewide in terms of Hispanic residents as a share of the population, out of 808 places.

Since the 2020 Census, Waterloo's Hispanic population has declined by an estimated 3.8%. Hispanic residents' share of Waterloo's population has decreased from 17.4% to 16.3%.

Waterloo is more Hispanic than neighboring Marshall (4% Hispanic), Lake Mills (8.6% Hispanic), Columbus (4.1% Hispanic), Deerfield (12.8% Hispanic), and Lake Ripley (4.1% Hispanic).

Waterloo's Native American/Other Population

0 residents of Waterloo, or 0.0% of the population, identify as American Indian/Alaska Native/Native Hawaiian/Pacific Islander/Other. The share of Native American/Other residents in Waterloo is comparable to the share in Wisconsin overall, where 0.9% of the population is Native American/Other. Waterloo ranks 482nd statewide in terms of Native American/Other residents as a share of the population, out of 808 places.

Since the 2020 Census, Waterloo's Native American/Other population has declined by an estimated 100.0%. Native American/Other residents' share of Waterloo's population has decreased from 0.5% to 0.0%.

Waterloo is less Native American/Other than neighboring Marshall (0.3% Native American/Other), Columbus (0.3% Native American/Other), Deerfield (0.1% Native American/Other), and Lake Ripley (0.9% Native American/Other).

Waterloo's Multiracial Population

12 residents of Waterloo, or 0.3% of the population, identify as Multiracial. The share of Multiracial residents in Waterloo is slightly lower than in Wisconsin overall, where 3.7% of the population is Multiracial. Waterloo ranks 526th statewide in terms of Multiracial residents as a share of the population, out of 808 places.

Since the 2020 Census, Waterloo's Multiracial population has declined by an estimated 87.1%. Multiracial residents' share of Waterloo's population has decreased from 2.7% to 0.3%.

Waterloo is less Multiracial than neighboring Marshall (5% Multiracial), Lake Mills (1.9% Multiracial), Columbus (3% Multiracial), Deerfield (5% Multiracial), and Lake Ripley (3% 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.