Join Free

1940s Maps of San Joaquin County, California

Explore 16 historic maps of San Joaquin 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 San Joaquin 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 San Joaquin County's history through authentic maps from the 1940s. This is your window into the past.

San Joaquin County, CA maps

(16)
  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. 1941 Map of Modesto West
    1941 Map of Modesto West
    1941 Modesto West
    1941 Print · USGS
    The Central Valley river system is captured here in the early 1940s, showing the complex web of irrigation canals and rural school districts. Genealogists can trace family footprints near Grayson or the Farm Security Administration Camp, and locate landmarks like Shiloh School or Tuolumne City.
    3 unique versions available
  7. 1941 Map of Franklin, 1942 Print
    1941 Map of Franklin, 1942 Print
    1941 Franklin
    1942 Print · USGS
    Sacramento and San Joaquin counties are depicted here in the early 1940s, highlighting a vital agricultural and rail corridor. Researchers can trace family-named school districts and early industry like the Bradford Winery, Hicksville, and the Sacramento Co Old Mens Home.
  10. 1942 Map of Farmington
    1942 Map of Farmington
    1942 Farmington
    1942 Print · USGS
    The San Joaquin and Stanislaus border country is revealed in the early 1940s as a complex network of rail lines and irrigation canals. Genealogists and historians can trace old school districts like Burwood Sch, the tracks of the Southern Pacific, and the early layout of Escalon.
  13. 1942 Map of Bellota
    1942 Map of Bellota
    1942 Bellota
    1942 Print · USGS
    San Joaquin County agriculture and rail systems are in full view during the early 1940s. Trace family roots through many rural schoolhouses like Bruella Sch and early settlements such as Dogtown, Lockeford, and Bellota.
  16. 1942 Map of Modesto East
    1942 Map of Modesto East
    1942 Modesto East
    1942 Print · USGS
    Stanislaus County during the early war years shows an intricate landscape of irrigation canals and rural schoolhouses. Genealogists can locate family landmarks like St Stanislaus Cem, Robinson School, and the historic Thompson Rancho.
  19. 1942 Map of Carbona
    1942 Map of Carbona
    1942 Carbona
    1942 Print · USGS
    The rail-and-river landscape of the San Joaquin Valley is captured here just as Tracy was expanding into a regional hub. Genealogists and historians can trace the rural school system through New Jerusalem School and find local landmarks like the Brichetto Tomb and Buckeye Mines.
  22. 1942 Map of Mt. Boardman
    1942 Map of Mt. Boardman
    1942 Mt. Boardman
    1942 Print · USGS
    The Diablo Range highlands at the intersection of four counties are captured here in the early 1940s. Genealogists and historians can locate remote family holdings like the Schmidt Ranch and Jordan Ranch or trace the early paths through San Antone Valley.
  25. 1942 Map of Lodi
    1942 Map of Lodi
    1942 Lodi
    1942 Print · USGS
    The San Joaquin delta region thrives as a complex network of reclaimed islands and sloughs in the early 1940s. Genealogists and historians can trace the foundations of local society through Thornton Migratory Labor Camp, Liberty School, and the busy Mokelumne River landings.
  28. 1942 Map of Altamont, 1964 Print
    1942 Map of Altamont, 1964 Print
    1942 Altamont
    1964 Print · USGS
    Eastern Alameda County at the start of the war shows a landscape of rail sidings and cattle ranching as the valley meets the ridges. Genealogists and historians can trace family locations like Mendenhall Ranch, rural landmarks like Green School, and the steep rail route through Altamont.
  31. 1943 Map of Tesla
    1943 Map of Tesla
    1943 Tesla
    1943 Print · USGS
    The Livermore Valley and the rugged Diablo Range are shown during the early 1940s, featuring the critical rail junction at Altamont. Genealogists and historians can locate rural landmarks like the Green School, the Mendenhall Ranch, and the isolated Pointers Homestead.
  34. 1943 Map of Mt. Boardman
    1943 Map of Mt. Boardman
    1943 Mt. Boardman
    1943 Print · USGS
    The Diablo Range in the early 1940s reveals a network of remote ranching outposts and mineral extraction sites. Genealogists can locate named homesteads like Winegar Ranch while historians trace the operations of the Westvaco Mine and Adobe Mine.
  37. 1944 Map of Valley Springs
    1944 Map of Valley Springs
    1944 Valley Springs
    1944 Print · USGS
    Calaveras County was a landscape of ranching and river engineering during the early 1940s, just as the regional water system was expanding. Genealogists and historians can trace the foundations of Camanche and Lancha Plana or locate local landmarks like Stone Corral Ch and Hogan Dam.
    4 unique versions available
  40. 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
  43. 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.
  46. 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.
End of results
Showing maps 1-16 of 16

Top cities of San Joaquin County

See more

Frequently asked questions

  • What are the different types of historical maps available for San Joaquin County?
  • What is the oldest map of San Joaquin County?
  • Where can I purchase historical maps of San Joaquin County for my home or office?
  • Where can I download high-res historical maps of San Joaquin County?
  • Are there historical topographic maps available for San Joaquin County?
  • Is there historical aerial imagery available for San Joaquin County?
  • Where are historical maps of San Joaquin County sourced from?