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Waterloo, California

Census designated place in San Joaquin County, California · ZIP 95215

  • San Joaquin County
  • Census data · ACS 2019-2023
  • 1 public schools
Join WaterlooAsk WaterlooBusinessesPeople
  • 886 (2019-2023 estimate)Population
  • 345Households
  • $250,001Median household income
  • $883,200Median home value
  • 1Public schools
  • 1ZIP codes

About Waterloo

This page shows only what has been published about Waterloo: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.

Town intelligenceOfficial sources, refreshed yearly

Population, 2010 to 2020−6.6%
5205405605802010: 57220102020: 5342020572534
Population of Waterloo at each census
CensusPopulation
2010572
2020534

As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.

Sources: Census 2010 Summary File 1: total population, place level, state 06, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 06, retrieved November 14, 2026.

Household income in Waterloo
Under $50k13.6%
$50k to $100k24.3%
$100k to $150k0%
$150k to $200k0%
$200k and over62%

Median household income $250,001 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.

Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 06, retrieved November 14, 2026.

Housing tenure in Waterloo
Owner occupied
133 units
Renter occupied
212 units
Vacancy rate
0%

Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.

Source: American Community Survey 5-year data profile 2019–2023, place level, state 06, retrieved November 14, 2026.

Waterloo compared with its county and state
Waterloo compared with its county and state, American Community Survey 2019-2023
MeasureWaterlooSan Joaquin CountyCalifornia
Population886787,41639,242,785
Median household income$250,001$88,531$96,334
Median age53.735.237.6
Median home value$883,200$494,500$695,400
Bachelor’s degree or higher27.3%21.6%36.5%
Foreign-born residents6.4%24.5%26.7%
Owner-occupied homes38.6%61.5%55.8%
Mean commute to work28.0 minutes34.6 minutes29.0 minutes

Source: American Community Survey 5-year data profile 2019–2023, place level, state 06, retrieved November 14, 2026.

CommunityRules and moderation

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Events in WaterlooAll events

Coming up in WaterlooAll events

No upcoming event is listed in Waterloo yet. Members and businesses add events from the Events page; each is screened before it shows.

Schools

Public schools in Waterloo1
Public schools in Waterloo, NCES directory 2023–2024
SchoolTypeGradesDistrict
Waterloo ElementaryPublic5–8Linden Unified

Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.

Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.

Legislative districts

Legislative districts for Waterloo3
Congressional and state legislative districts for Waterloo
ChamberDistrict
U.S. House of RepresentativesCongressional District 9 (CA-9)
State legislature, lower chamberAssembly District 9
State legislature, upper chamberState Senate District 5

Boundaries from the Census Bureau’s TIGER/Line district files, matched to Waterloo’s own boundary. Who holds each seat appears on the People page once the official records are approved.

Sources: Census cartographic boundaries 2025: congressional districts, 119th Congress, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, upper chamber, state 06, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 06, retrieved November 14, 2026.

Frequently asked about WaterlooPromoted from questions people asked

No question about Waterloo has been asked often enough to publish an answer yet. Ask Waterloo and the answer, once a person checks it, appears here.

Nearby towns

Other towns in San Joaquin County

All towns in San Joaquin County