Waterloo

County:: San Joaquin County
County Seat:: No
Area (mi²):: 5.435
State:: California

Waterloo is a CDP located in San Joaquin County, California. Waterloo has a 2025 population of 907. Waterloo is currently growing at a rate of 2.49% annually and its population has increased by 0.55% since the most recent census, which recorded a population of 902 in 2020.

The average household income in Waterloo is $199,155 with a poverty rate of 5.64%. The median age in Waterloo is 53.7 years: 55.9 years for males, and 41.9 years for females.

Demographics

The racial composition of Waterloo includes 86.57% White, and smaller percentages for other race, Asian, Black or African American, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Two or more races

Other race

Asian

Black or African American

Native American

Native Hawaiian or Pacific Islander

Race	Population	Percentage (of total)
White	767	86.57%
Two or more races	87	9.82%
Other race	22	2.48%
Asian	10	1.13%
Black or African American	0	0%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

Waterloo Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Waterloo's average per capita income is $96,293. Household income levels show a median of $250,001. The poverty rate stands at 5.64%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Households	$250,001	$199,155
Families	$250,001	$211,769
Married Families	$250,001	-
Non Families	$36,111	$39,839

$96,293

Average Income

$250,001

Median Household Income

5.64%

Poverty Rate