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1940s Maps of Napa County, California

Explore 18 historic maps of Napa 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 Napa 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 Napa County's history through authentic maps from the 1940s. This is your window into the past.

Napa County, CA maps

(18)
  1. 1940 Map of Carquinez Strait, 1963 Print
    1940 Map of Carquinez Strait, 1963 Print
    1940 Carquinez Strait
    1963 Print · USGS
    Covers Napa County, including Concord, Vallejo, and other nearby areas
    2 unique versions available
  4. 1942 Map of Mare Island
    1942 Map of Mare Island
    1942 Mare Island
    1942 Print · USGS
    Covers Napa County, including Vallejo, Richmond, and other nearby areas
  7. 1942 Map of Carquinez
    1942 Map of Carquinez
    1942 Carquinez
    1942 Print · USGS
    Covers Napa County, including Concord, Vallejo, and other nearby areas
  10. 1942 Map of Sonoma
    1942 Map of Sonoma
    1942 Sonoma
    1942 Print · USGS
    Covers Napa County, including Napa, Sonoma, and other nearby areas
  13. 1942 Map of Mt. Vaca
    1942 Map of Mt. Vaca
    1942 Mt. Vaca
    1942 Print · USGS
    Covers Napa County, including Fairfield, Vacaville, and other nearby areas
    2 unique versions available
  16. 1942 Map of St. Helena, 1966 Print
    1942 Map of St. Helena, 1966 Print
    1942 St. Helena
    1966 Print · USGS
    Covers Napa County, including Howell Mountain, Pope Valley, and other nearby areas
  19. 1943 Map of Morgan Valley
    1943 Map of Morgan Valley
    1943 Morgan Valley
    1943 Print · USGS
    Covers Napa County, including Knoxville, Yolo County, and other nearby areas
  22. 1943 Map of Capay, 1945 Print
    1943 Map of Capay, 1945 Print
    1943 Capay
    1945 Print · USGS
    Covers Napa County, including Winters, Esparto, and other nearby areas
  25. 1943 Map of Calistoga, 1955 Print
    1943 Map of Calistoga, 1955 Print
    1943 Calistoga
    1955 Print · USGS
    Covers Napa County, including Santa Rosa, Calistoga, and other nearby areas
  28. 1944 Map of Santa Rosa
    1944 Map of Santa Rosa
    1944 Santa Rosa
    1944 Print · USGS
    Covers Napa County, including Santa Rosa, Petaluma, and other nearby areas
    2 unique versions available
  31. 1944 Map of Morgan Valley
    1944 Map of Morgan Valley
    1944 Morgan Valley
    1944 Print · USGS
    Covers Napa County, including Knoxville, Yolo County, and other nearby areas
    2 unique versions available
  34. 1945 Map of Capay
    1945 Map of Capay
    1945 Capay
    1945 Print · USGS
    Covers Napa County, including Winters, Esparto, and other nearby areas
  37. 1945 Map of Calistoga
    1945 Map of Calistoga
    1945 Calistoga
    1945 Print · USGS
    Covers Napa County, including Santa Rosa, Calistoga, and other nearby areas
    2 unique versions available
  40. 1945 Map of Rumsey
    1945 Map of Rumsey
    1945 Rumsey
    1945 Print · USGS
    Covers Napa County, including Tancred, Guinda, and other nearby areas
    2 unique versions available
  43. 1945 Map of St. Helena
    1945 Map of St. Helena
    1945 St. Helena
    1945 Print · USGS
    Covers Napa County, including Howell Mountain, Pope Valley, and other nearby areas
    2 unique versions available
  46. 1947 Map of Santa Rosa
    1947 Map of Santa Rosa
    1947 Santa Rosa
    1947 Print · USGS
    Covers Napa County, including Santa Rosa, Concord, and other nearby areas
  49. 1949 Map of Santa Rosa
    1949 Map of Santa Rosa
    1949 Santa Rosa
    1949 Print · USGS
    Covers Napa County, including Santa Rosa, Concord, and other nearby areas
    2 unique versions available
  52. 1949 Map of Cuttings Wharf, 1956 Print
    1949 Map of Cuttings Wharf, 1956 Print
    1949 Cuttings Wharf
    1956 Print · USGS
    Covers Napa County, including Vallejo, Napa, and other nearby areas
    8 unique versions available
End of results
Showing maps 1-18 of 18

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Frequently asked questions

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