Townapedia
Byron Main Street 003
Byron Main Street 003 · Captndelta, CC BY-SA 3.0
Byron Main Street 002
Byron Main Street 002 · Captndelta, CC BY-SA 3.0
Byron Main Street 001
Byron Main Street 001 · Captndelta, CC BY-SA 3.0
Byron Hot Springs 029
Byron Hot Springs 029 · Captndelta, CC BY-SA 3.0
Byron Hot Springs 034
Byron Hot Springs 034 · Captndelta, CC BY-SA 3.0
Byron Hot Springs 030
Byron Hot Springs 030 · Captndelta, CC BY-SA 3.0

Byron, California

Byron is a community of 1,837 people in Contra Costa County, California.

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Population1,837 +40.9% since 2019
Elevation33 ft 10 m
Land area6.5 sq mi
ZIP codes94513, 94514
Nearest airportLivermore Municipal Airport (LVK) 16 mi

Why visit Byron

Townapedia lists 1 museum or landmark, 2 parks and trails and 3 places to eat in and around town.

July is the warmest month, with average highs of 93°F; December lows average 40°F.

About Byron

Byron is a census designated place (CDP) in Contra Costa County, California, United States. As of the 2020 census, Byron had a population of 1,140.

From the Wikipedia article Byron, California (this version), under CC BY-SA 4.0.

Museums and landmarks1

Byron

Monument and historic site · 0.4 mi

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Parks, trails and playgrounds2

Regatta Park

Park · 1.3 mi

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Slifer Park

Park · 2.4 mi

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Restaurants and cafes3

Starbucks

Cafe · Coffee Shop · 1.5 mi

14804 CA-4, Discovery Bay

Open in Google Maps · +1 925-513-4991

Round Table Pizza

Restaurant · Pizza · 1.5 mi

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McDonald's

Fast food · Burger · 1.5 mi

14896 Highway 4, Discovery Bay

06:00-23:00

Open in Google Maps · +1 925-513-4025

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Shopping1

Safeway

Grocery · 1.5 mi

14840 State Highway 4, Discovery Bay

24/7

Open in Google Maps · +1 925-626-6000

History

Byron's location was part of a land grant that Jose Noriega received from the King of Spain in 1835. Noriega then sold 17,000 acres to John Marsh for the equivalent of $500 (three U.S. cents per acre). In 1841, the Bidwell-Bartelson wagon train arrived at Marsh's ranch with the earliest Anglo settlers from the east.

Byron's first post office opened in 1878. Byron is named after an employee of the San Pablo, and the eastern U. S. and Pacific Railroad.

In 1942, all of the town's residents of Japanese descent were forcibly removed by the US government with pressure from California agricultural interests and taken to Turlock assembly center.

In 1960, Contra Costa County built the Orin Allen Youth Rehabilitation Center, better known informally as the Boys' Ranch on a 50 acres (200,000 m2) tract immediately southeast of Byron. The Boys' Ranch is a minimum-security facility that houses up to 100 youthful offenders. The property has no security fence to contain residents within the perimeter and includes dormitories, classrooms, a kitchen and dining facility, athletic facilities and administrative offices which occupy about one-third of the area. Its objective was stated as rehabilitation, rather than simply detention.

From the History section of Byron, California on Wikipedia, under CC BY-SA 4.0.

Gas and EV charging1

Schools, colleges and libraries15

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Healthcare1

Map of Byron

24 places. The map loads OpenStreetMap tiles when you open it.

Climate by month

40°60°80°100°January: 2.5 in of rainFebruary: 2.3 in of rainMarch: 1.6 in of rainApril: 0.8 in of rainMay: 0.5 in of rainJune: 0.1 in of rainJuly: 0.0 in of rainAugust: 0.0 in of rainSeptember: 0.1 in of rainOctober: 0.7 in of rainNovember: 1.3 in of rainDecember: 2.4 in of rainJanuary: 56°FFebruary: 62°FMarch: 67°FApril: 73°FMay: 80°FJune: 88°FJuly: 93°FAugust: 92°FSeptember: 89°FOctober: 79°FNovember: 66°FDecember: 57°FJanuary: 40°FFebruary: 44°FMarch: 47°FApril: 50°FMay: 55°FJune: 59°FJuly: 62°FAugust: 62°FSeptember: 60°FOctober: 54°FNovember: 46°FDecember: 40°FJFMAMJJASOND
Average high Average low Rain
Monthly table
MonthHighLowRainSnow
Jan56°F40°F2.5 in0.0 in
Feb62°F44°F2.3 in0.0 in
Mar67°F47°F1.6 in0.0 in
Apr73°F50°F0.8 in0.0 in
May80°F55°F0.5 in0.0 in
Jun88°F59°F0.1 in0.0 in
Jul93°F62°F0.0 in0.0 in
Aug92°F62°F0.0 in0.0 in
Sep89°F60°F0.1 in0.0 in
Oct79°F54°F0.7 in0.0 in
Nov66°F46°F1.3 in0.0 in
Dec57°F40°F2.4 in0.0 in

U.S. Climate Normals 1991-2020 for Tracy Pumping Plt (6 mi away), NOAA NCEI.

People and cost of living

$76,424median household income
$750,000median home value
$2,643median monthly rent
45.6median age
15.7%of adults have a bachelor's degree or higher
59.9%of homes are owner-occupied
38.1 minaverage commute
Age of residents
Under 1817%18 to 3427%35 to 6444%65 and over12%

American Community Survey 5-year estimates, 2020-2024, U.S. Census Bureau. Estimates have margins of error, larger for small towns.

Disaster history

Contra Costa County has had 9 federal disaster declarations since 2000, most often for floods.

  • 2023-01-14: Severe Winter Storms, Flooding, Landslides, And Mudslides (Flood)
  • 2023-01-09: Severe Winter Storms, Flooding, And Mudslides (Flood)
  • 2020-03-22: Covid-19 Pandemic (Biological)
  • 2020-03-13: Covid-19 (Biological)
  • 2017-04-01: Severe Winter Storms, Flooding, And Mudslides (Flood)
  • 2017-03-16: Severe Winter Storms, Flooding, And Mudslides (Flood)

OpenFEMA disaster declarations summaries.

Getting there and nearby towns

Livermore Municipal Airport (LVK) is the nearest airport with scheduled flights listed in OpenStreetMap, 16 miles away.

Drive times are estimates from straight-line distance, not routes.

Reviews, tips and questions

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Sources and licences

Photo credits

Page built October 30, 2026. Spotted a mistake? Tell us or suggest a place.