Waterloo, CA Demographics

A map of Waterloo's Population by Race

Race	2024 Pop	2020 Pop	2024 %	2020 %
White	793	303	88.7%	56.7%
Hispanic	98	193	11.0%	36.1%
Multiracial	3	20	0.3%	3.7%
Black	0	1	0.0%	0.2%
Asian	0	14	0.0%	2.6%
Native American/Other	0	3	0.0%	0.6%

Waterloo, California has an estimated population of 894, a dramatic increase from the 534 recorded in the 2020 Census. The population is 88.7% White, 11.0% 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 California 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 54.5% in 2020 and 20.1% in the most recent ACS estimates.

Waterloo is ranked the 1093rd most populous place in California, out of 1,618 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 1213th most populous place in the 2020 Census.

Waterloo's White Population

793 residents of Waterloo, or 88.7% of the population, identify as White. The share of White residents in Waterloo is significantly higher than in California overall, where 33.8% of the population is White. Waterloo ranks 833rd statewide in terms of White residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Waterloo's White population has grown by an estimated 161.7%. White residents' share of Waterloo's population has increased from 56.7% to 88.7%.

Waterloo is more White than neighboring Morada (56.2% White), Garden Acres (11.8% White), Linden (63% White), August (11% White), and Victor (28.3% 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 California overall, where 5.2% of the population is Black. Waterloo ranks 1287th statewide in terms of Black residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Waterloo's Black population has declined by an estimated 100.0%. Black residents' share of Waterloo's population has remained roughly unchanged at 0.0%.

Waterloo is less Black than neighboring Morada (0.6% Black), Garden Acres (1.2% Black), Linden (4.2% Black), and August (0.5% 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 significantly lower than in California overall, where 15.3% of the population is Asian. Waterloo ranks 710th statewide in terms of Asian residents as a share of the population, out of 1,618 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 2.6% to 0.0%.

Waterloo is less Asian than neighboring Morada (10.2% Asian), Garden Acres (2.3% Asian), and August (0.4% Asian).

Waterloo's Hispanic Population

98 residents of Waterloo, or 11.0% of the population, identify as Hispanic. The share of Hispanic residents in Waterloo is significantly lower than in California overall, where 40.2% of the population is Hispanic. Waterloo ranks 540th statewide in terms of Hispanic residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Waterloo's Hispanic population has declined by an estimated 49.2%. Hispanic residents' share of Waterloo's population has decreased from 36.1% to 11.0%.

Waterloo is less Hispanic than neighboring Morada (27.5% Hispanic), Garden Acres (83.4% Hispanic), Linden (30.1% Hispanic), August (83.4% Hispanic), and Victor (71.7% 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 California overall, where 1.2% of the population is Native American/Other. Waterloo ranks 1391st statewide in terms of Native American/Other residents as a share of the population, out of 1,618 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 0.6% to 0.0%.

Waterloo is less Native American/Other than neighboring Morada (1.1% Native American/Other), Garden Acres (0.3% Native American/Other), and August (0.2% Native American/Other).

Waterloo's Multiracial Population

3 residents of Waterloo, or 0.3% of the population, identify as Multiracial. The share of Multiracial residents in Waterloo is slightly lower than in California overall, where 4.4% of the population is Multiracial. Waterloo ranks 1035th statewide in terms of Multiracial residents as a share of the population, out of 1,618 places.

Since the 2020 Census, Waterloo's Multiracial population has declined by an estimated 85.0%. Multiracial residents' share of Waterloo's population has decreased from 3.7% to 0.3%.

Waterloo is more Multiracial than neighboring Victor (0% Multiracial). Waterloo is less Multiracial than neighboring Morada (4.3% Multiracial), Garden Acres (1% Multiracial), Linden (2.6% Multiracial), and August (4.5% 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.