Ione is a city in Amador County, California, home to about 9,156 people across 4.6 square miles. Its ZIP code is 95640.
Homes sold for a median of $280 per square foot in the three months ending August 2026, a seller’s market.
Mostly Ione; also Camanche Village and Camanche North Shore
Each card is that ZIP code’s whole market, including any part outside Ione. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Ione’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)43 miles away |
|---|---|
| Closer regional airport | Stockton Metropolitan Airport (SCK)34 miles away |
| Nearest city of 250,000+ | Stockton, CA32 miles away |
| Nearest city of 1 million+ | Los Angeles, CA330 miles away |
Straight-line distances from the center of Ione; 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.
Ione had 5,141 residents in the 2020 census, down 28% since 2000.
It’s the 515th largest of 1,563 towns in California by population.
Amador County grew from 11,116 residents in 1900 to 40,474 in 2020.
Amador 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 40°F. About 22.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Camp Pardee, CA weather station (8 miles away).
7,776 jobs at 868 businesses in Amador County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
67 doctors and other health care providers list an office in Ione.
Nearest hospitals
Providers with an office here
| Primary care doctors | 9 |
|---|---|
| Specialist doctors | 2 |
| Dentists | 8 |
| Nurse practitioners and physician assistants | 5 |
| Mental health providers | 42 |
| Chiropractors | 1 |
| Pharmacies | 4 |
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)
Pharmacies (1 nearby)
Libraries (1 nearby)
Museums
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.
Established in 1849.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Amador County Unified. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Ione ElementaryIone | K–6 | 564 | Public | 1.3 mi |
| Ione Junior HighIone | 6–8 | 387 | Public | 1.2 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 Camanche Village, Camanche North Shore and Buena Vista.
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.