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1940s Maps of Contra Costa County, California

Explore 31 historic maps of Contra Costa County from the 1940s. These maps offer a rare glimpse into what life looked like during the 1940s — showing old roads, neighborhoods, homes, and landmarks that have changed or disappeared over time.

Whether you're researching your family's past, planning a metal detecting trip, or studying how Contra Costa County's landscape evolved across the 1940s, these high-resolution maps are a powerful tool for exploring the history of this region.

  • Focus on a specific era: All maps on this page are from the 1940s, giving you a focused view of this time period.
  • See what’s changed: Compare century-old streets, trails, and buildings to today's modern landscape using overlays and satellite layers.
  • Research with precision: Use these maps for genealogy, historical research, land use analysis, or educational projects.
  • View, download, or print: Maps are fully viewable online in high resolution, and can be downloaded or printed for your own records.

Start exploring Contra Costa County's history through authentic maps from the 1940s. This is your window into the past.

Contra Costa County, CA maps

(31)
  1. 1940 Map of Byron, 1943 Print
    1940 Map of Byron, 1943 Print
    1940 Byron
    1943 Print · USGS
    The California Delta meets the coastal hills during the early 1940s, showing a transition from the orchards of Brentwood to the intricate waterways of the islands. Researchers can trace historic schools like Iron House Sch, rail stops at Knighten Sta, and the famous Byron Hot Springs.
  4. 1940 Map of Carquinez Strait, 1963 Print
    1940 Map of Carquinez Strait, 1963 Print
    1940 Carquinez Strait
    1963 Print · USGS
    The industrial waterfronts of Solano and Contra Costa counties are captured here just before the mid-century boom. Genealogists and historians can trace the rail-and-water networks of Port Costa, Benicia, and Vallejo, or locate landmarks like the Carquinez Cem and the Benicia Auto Ferry.
    2 unique versions available
  7. 1941 Map of Pleasanton
    1941 Map of Pleasanton
    1941 Pleasanton
    1941 Print · USGS
    The Livermore Valley and East Bay hills are captured here in the early 1940s, showing a world of cattle ranchos and railroad towns. You can trace early landmarks like the Mission San Jose de Guadalupe, the Livermore Airport, and several rural one-room schoolhouses like Antone Sch.
  10. 1942 Map of Mare Island
    1942 Map of Mare Island
    1942 Mare Island
    1942 Print · USGS
    The northern reaches of San Pablo Bay come alive in this wartime survey, showing a landscape of vital naval yards and marshland agriculture. Genealogists and historians can trace rail depots like Napa Junction, rural landmarks like American Canyon School, and the industrial waterfronts of Vallejo and Oleum.
  13. 1942 Map of Concord
    1942 Map of Concord
    1942 Concord
    1942 Print · USGS
    The East Bay interior was a landscape of expanding valley towns and deep-rooted ranching tracts in the early 1940s. Genealogists and historians can trace rail-era settlements like Concord, Lafayette, and Walnut Creek alongside local landmarks like St Marys College and Sherman Field.
  16. 1942 Map of Carquinez
    1942 Map of Carquinez
    1942 Carquinez
    1942 Print · USGS
    The industrial waterfront of the Carquinez Strait is captured here during the early years of the war. Researchers can trace the complex rail networks of the Southern Pacific and locate established neighborhoods in Vallejo, Benicia, and Crockett.
  19. 1942 Map of Hayward
    1942 Map of Hayward
    1942 Hayward
    1942 Print · USGS
    The East Bay shoreline and inland foothills come alive in the early 1940s as industry and infrastructure reshape the landscape. Researchers can trace the original footprints of Russell City and Mt Eden or locate the historic Oakland Speedway and Fairmont Hospital.
  22. 1943 Map of Pleasanton
    1943 Map of Pleasanton
    1943 Pleasanton
    1943 Print · USGS
    The Livermore and Amador Valleys are captured during the early 1940s, showing a landscape of ranching, railroads, and early institutional development. Genealogists and historians can locate old schools like Stonybrook Sch and landmarks such as Mission San Jose de Guadalupe.
  25. 1943 Map of Concord
    1943 Map of Concord
    1943 Concord
    1943 Print · USGS
    The East Bay and Contra Costa interior appear here during the wartime era, showing the transition from urban waterfronts to rural valley communities. Researchers can trace early rail lines like the Sacramento Northern RR and locate local landmarks such as St Marys College and Acalanes Sch.
  28. 1943 Map of Mt. Diablo
    1943 Map of Mt. Diablo
    1943 Mt. Diablo
    1943 Print · USGS
    The Mt. Diablo foothills and San Ramon Valley are captured here during the early 1940s, showcasing a landscape of cattle ranches and remote schoolhouses. Genealogists and local historians can locate early landmarks like Blackhawk Ranch, Cowell, and the Morgan Territory Sch.
  31. 1947 Map of Santa Rosa
    1947 Map of Santa Rosa
    1947 Santa Rosa
    1947 Print · USGS
    Northern California in the late 1940s was a landscape of agricultural valleys and vital rail hubs. Trace the historic routes of the Northwestern Pacific through Healdsburg or explore the mid-century waterfronts of Vallejo and Benicia near Mare Island.
  34. 1947 Map of San Francisco, 1948 Print
    1947 Map of San Francisco, 1948 Print
    1947 San Francisco
    1948 Print · USGS
    The Bay Area in the late 1940s reveals a region transitioning from wartime intensity to post-war suburban growth. Trace the historic rail lines of the Southern Pacific RR or locate early military footprints at Fort Funston and Moffett Field.
  37. 1947 Map of Sacramento, 1948 Print
    1947 Map of Sacramento, 1948 Print
    1947 Sacramento
    1948 Print · USGS
    The Sacramento Valley meets the high Sierra during a period of post-war expansion. Trace the historic river delta islands like Grand Island or locate early airfield footprints at McClellan Air Force Base and Mather Air Force Base.
    2 unique versions available
  40. 1947 Map of San Jose, 1948 Print
    1947 Map of San Jose, 1948 Print
    1947 San Jose
    1948 Print · USGS
    Northern California's heartland is captured here just after the war, showing the rapid growth of the Santa Clara and Central Valleys. Researchers can trace the legacy of rail and water at Castle Air Force Base, Stockton, and the Hetch Hetchy Aqueduct.
  43. 1947 Map of Richmond, 1952 Print
    1947 Map of Richmond, 1952 Print
    1947 Richmond
    1952 Print · USGS
    Post-war development transforms the East Bay shoreline as industry and suburbs expand between the bay and the hills. Trace mid-century landmarks like the Oil Tank Farm, Richmond Union HS, and the sprawling Charles Lee Tilden Regional Park.
    2 unique versions available
  46. 1947 Map of Walnut Creek, 1954 Print
    1947 Map of Walnut Creek, 1954 Print
    1947 Walnut Creek
    1954 Print · USGS
    Central Contra Costa County is shown here in the late 1940s, transitioning from a landscape of quiet valleys and orchards to a growing suburban network. Researchers can trace the heritage of Walnut Creek and Concord through landmarks like the Fernando Adobe and the Sacramento Northern rail lines.
  49. 1947 Map of Briones Valley, 1954 Print
    1947 Map of Briones Valley, 1954 Print
    1947 Briones Valley
    1954 Print · USGS
    Contra Costa County at the dawn of the postwar era shows the early expansion of Orinda and Lafayette into the surrounding hills. Genealogists and hikers can trace the original Briones Valley Sch, the winding path of Bear Creek, and the massive San Pablo Reservoir.
  52. 1947 Map of Oakland East, 1954 Print
    1947 Map of Oakland East, 1954 Print
    1947 Oakland East
    1954 Print · USGS
    The East Bay waterfront and hills are caught in a moment of rapid postwar expansion during the late 1940s. Genealogists and local historians can locate early neighborhood schools like Cleveland School, historic burial grounds at Mountain View Cemetery, and the extensive Southern Pacific rail network.
    3 unique versions available
  55. 1947 Map of San Quentin, 1956 Print
    1947 Map of San Quentin, 1956 Print
    1947 San Quentin
    1956 Print · USGS
    The San Francisco Bay area in the late 1940s reveals a landscape of ferry-connected shores and burgeoning industry. Trace the historic Richmond-San Rafael Ferry route, the State Penitentiary, and the Tiburon Naval Net Depot.
  58. 1947 Map of Las Trampas Ridge, 1956 Print
    1947 Map of Las Trampas Ridge, 1956 Print
    1947 Las Trampas Ridge
    1956 Print · USGS
    Contra Costa County at the start of the postwar era shows a landscape of cattle ranches and early valley settlements. Trace the original footprints of Alamo and Danville alongside the Southern Pacific tracks and the St Marys College campus.
  61. 1947 Map of Hayward, 1957 Print
    1947 Map of Hayward, 1957 Print
    1947 Hayward
    1957 Print · USGS
    The East Bay's post-war suburban transformation is evident in this mid-century view of the Hayward area. Genealogists and local historians can trace legacy sites like the Mt Eden Sta, the Oakland Speedway, and the Holy Sepulchre Cemetery.
  64. 1948 Map of San Quentin
    1948 Map of San Quentin
    1948 San Quentin
    1948 Print · USGS
    The North Bay waterfront comes alive in the late 1940s, showing the active ferry routes and military installations of the era. Genealogists and historians can trace the Richmond-San Rafael Ferry, the State Penitentiary, and the Tiburon Naval Net Depot.
    2 unique versions available
  67. 1948 Map of Sacramento, 1951 Print
    1948 Map of Sacramento, 1951 Print
    1948 Sacramento
    1951 Print · USGS
    Post-war Northern California comes alive in this regional survey, capturing the era of expansion between the Central Valley and the High Sierra. Researchers can trace the rail networks of the Central California Traction and Sacramento Northern RR or locate landmarks like the State Capitol and University of California Davis.
  70. 1948 Map of San Francisco, 1951 Print
    1948 Map of San Francisco, 1951 Print
    1948 San Francisco
    1951 Print · USGS
    The Bay Area in the late 1940s reveals a landscape defined by rapid post-war growth and a heavy military presence at the Golden Gate. Trace the development of early trans-bay infrastructure like the Oakland-Bay Bridge and historic coastal defense sites such as Fort Funston and Alcatraz Island.
  73. 1949 Map of Walnut Creek
    1949 Map of Walnut Creek
    1949 Walnut Creek
    1949 Print · USGS
    Post-war Contra Costa County is shown here as suburban growth begins to reach into the valley's traditional orchards and rail corridors. Trace the development of Concord and Walnut Creek through landmarks like Buchanan Field, St Stephens Cem, and the Sacramento Northern line.
    2 unique versions available
Showing maps 1-25 of 31

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Frequently asked questions

  • What are the different types of historical maps available for Contra Costa County?
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