Waterloo Flag

Waterloo

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.

907
Total Population
167
Density (mi²)
22 2.49%
Growth

Waterloo Population

Waterloo Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Waterloo includes 86.57% White, and smaller percentages for other race, Asian and multiracial populations.

Population by Race

Race
Population
Percentage (of total)
White76786.57%
Two or more races879.82%
Other race222.48%
Asian101.13%

Waterloo Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

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

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)