Daylight through the yearLongest day (Jun 21): 14 h 48 min5:44 am – 8:32 pmShortest day (Dec 21): 9 h 32 min7:19 am – 4:50 pm
Sun todaySunrise –Sunset –
People46,368 residentsin the ZIP code areaMedian age 36.414,105 householdsMedian household income $134,678Median home value $659,800Median rent $1,952 a month78% of homes owner-occupiedMedian property tax $6,517 a yearSource: US Census Bureau, American Community Survey 2020-2024
Work and commuting6.2% unemployment rate68% of adults are in the labour force, 23,579 employedMain industries: education and health care 22%, professional and business services 13%, retail 13%Average commute 40 minutes73% drive alone, 9% car-pool, 1% take public transport, 17% work from homeSource: US Census Bureau, American Community Survey 2020-2024, ZIP area
Education and languages24% of adults have a bachelor's degree or higher89% finished high school, 6% hold a graduate degreeLanguages at home: English only 70%, Spanish 21%, Tagalog 4%, other Indo-European languages 3%11% speak English less than very wellSource: US Census Bureau, American Community Survey 2020-2024, ZIP area
ClimateWarmest month July: highs 91°F, lows 61°FColdest month January: highs 56°F, lows 40°F13 in of rain a year, on about 30 dayswettest month JanuarySnow is rare64 days above 90°F, 7 nights below freezing in a typical yearSource: NOAA 1991-2020 Climate Normals, Antioch Pumping Plt #3 station, 3 mi away
Parks and public landsEmerson Ranch Parkpark · under a mileBig Break Regional Shorelinepark · under a mile · 1,604 acresFranks Tract State Recreation Areastate recreation area · 4.4 mi · 3,589 acresAntioch Dunes National Wildlife Refugenational wildlife refuge · 5.4 mi · 63 acresLower Sherman Island Wildlife Areastate conservation land · 6.1 mi · 3,156 acresRhode Island Wildlife Areastate conservation land · 6.1 mi · 106 acresSource: USGS Protected Areas Database (PAD-US)
Earthquakes786 of magnitude 3 or more within 50 miles since 197083 of magnitude 4+, 9 of magnitude 5+Largest: magnitude 6.2 on 24 Apr 198447 mi away, The 1984 Morgan Hill, CaliforniaMost recent: magnitude 3.1 on 12 Sep 202612 mi awaySource: USGS Earthquake Catalog
Natural hazardsOverall risk Very HighContra Costa County, CA, compared with all US countiesHigher-risk hazardsRiver flooding Very HighEarthquake Relatively HighLandslide Relatively HighHeat wave Relatively HighSource: FEMA National Risk Index (county level)
Air quality60% of days had good air in 2025219 of 365 days measured146 moderate daysMedian index 46, worst day 93main pollutant: fine particles (PM2.5)Source: US EPA Air Quality Index, nearest monitors: San Joaquin County, CA, 23 mi away
Internet at home96% of households have a broadband subscription85% have cable, fibre or DSL7% rely on a mobile data plan alone3% have no internet at homeSource: US Census Bureau, American Community Survey 2020-2024
Drinking waterDiablo Water Districtserves 43,357 people from surface water purchasedNo health-based violations since 2021Source: US EPA Safe Drinking Water Information System, largest system serving the town
Elevation15 ft5 m above sea levelSource: USGS 3D Elevation Program
Local servicesHospitalSutter Delta Medical Center6.1 miPost officeOakley Post Officeunder a mileTown hallOakley City Hall1.5 miPoliceContra Costa County Sheriff's Office - Delta Station1.2 miFire stationContra Costa County Fire Protection District Station 931.2 miSource: USGS National Structures Dataset
SchoolsWithin 2 mi7 schools5 elementary, 2 middleMiddleDelta Vista Middle Schoolright hereElementaryIron House Elementary Schoolunder a mileMiddleO'Hara Park Middle School1.2 miCollegeLos Medanos College - Brentwood Center6.9 miSource: USGS National Structures Dataset
Getting aroundAirportBuchanan Field CCR20 miMajor airportOakland San Francisco Bay Airport OAK35 miInterstateI-518 miAmtrakAntioch-Pittsburg, CA ACA7.0 miSubwayMain Entrance / ExitBay Area Rapid Transit (BART)4.8 miCoachTracy Bus Stop Amtrak Bus StopAmtrak Chartered Vehicle21 miTransit3 stops within a mileTri Delta TransitSources: OurAirports; US Census Bureau TIGER roads; Bureau of Transportation Statistics NTAD
Distances in these cards are measured from the centre of the 94561 ZIP area.
