Waterloo is a community in San Joaquin County, California, home to about 894 people across 5.4 square miles. It has no ZIP code of its own: it’s part of 95215.
Homes sold for a median of $366 per square foot in the three months ending August 2026, a seller’s market.
Mostly Stockton; part is in Waterloo
Each card is that ZIP code’s whole market, including any part outside Waterloo. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Waterloo’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Sacramento International Airport (SMF)55 miles away |
|---|---|
| Closer regional airport | Stockton Metropolitan Airport (SCK)5 miles away |
| Nearest city of 250,000+ | Stockton, CA6 miles away |
| Nearest city of 1 million+ | Los Angeles, CA313 miles away |
Straight-line distances from the center of Waterloo; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Waterloo had 534 residents in the 2020 census, down 7% since 2010.
It’s the 1093rd largest of 1,563 towns in California by population.
San Joaquin County grew from 35,452 residents in 1900 to 779,233 in 2020.
San Joaquin County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 95°F in summer, and winter lows average 38°F. About 13.5 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Stockton Metro Ap, CA weather station (5 miles away).
232,910 jobs at 13,638 businesses in San Joaquin County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
102 doctors and other health care providers list an office in Waterloo.
Nearest hospitals
Providers with an office here
| Primary care doctors | 6 |
|---|---|
| Specialist doctors | 1 |
| Nurse practitioners and physician assistants | 11 |
| Mental health providers | 79 |
| Physical and occupational therapists | 3 |
| Chiropractors | 2 |
| Pharmacies | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (2 nearby)
Grocery stores (1 nearby)
Libraries
Museums
Theaters and performance venues
Counts are within about 1.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Escalon Unified, Stockton Unified, Linden Unified. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Collegeville ElementaryStockton | K–5 | 162 | Public | 4.6 mi |
| Elmwood ElementaryStockton | K–8 | 656 | Public | 1.0 mi |
| Glenwood ElementaryStockton | K–8 | 378 | Public | 2.5 mi |
| Waverly ElementaryStockton | K–8 | 438 | Public | 3.4 mi |
| Wilhelmina Henry ElementaryStockton | K–8 | 881 | Public | 1.3 mi |
| Waterloo ElementaryStockton | 5–8 | 339 | Public | 5.3 mi |
| Franklin HighStockton | 7–12 | 2,065 | Public | 2.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Stockton, Garden Acres and Farmington.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.