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Old Maps of Union, Napa for Academic Research

Study the evolution of Union with 10 high-resolution historic maps. Whether you're teaching, researching, or modeling changes in land use, these maps provide essential visual documentation of urban, environmental, and geographic change.

  • Analyze long-term change: Track patterns in development, transportation, and natural features.
  • Ideal for environmental or urban studies: Support academic projects with primary historical map data.
  • Use in the classroom or lab: Educators and researchers rely on these maps to bring historical context to life.

These maps are a powerful tool for teaching, research, and visualizing how Union has changed over the decades.

Union, Napa maps

(10)
  1. 1902 Map of Napa
    1902 Map of Napa
    1902 Napa
    1902 Print · USGS
    Covers Union, including Concord, Vallejo, and other nearby areas
    6 unique versions available
  4. 1942 Map of Sonoma
    1942 Map of Sonoma
    1942 Sonoma
    1942 Print · USGS
    Covers Union, including Napa, Sonoma, and other nearby areas
  7. 1947 Map of Santa Rosa
    1947 Map of Santa Rosa
    1947 Santa Rosa
    1947 Print · USGS
    Covers Union, including Santa Rosa, Concord, and other nearby areas
  10. 1949 Map of Santa Rosa
    1949 Map of Santa Rosa
    1949 Santa Rosa
    1949 Print · USGS
    Covers Union, including Santa Rosa, Concord, and other nearby areas
    2 unique versions available
  13. 1951 Map of Napa, 1952 Print
    1951 Map of Napa, 1952 Print
    1951 Napa
    1952 Print · USGS
    Covers Union, including Napa, Imola, and other nearby areas
    6 unique versions available
  16. 1951 Map of Sonoma, 1958 Print
    1951 Map of Sonoma, 1958 Print
    1951 Sonoma
    1958 Print · USGS
    Covers Union, including Napa, Sonoma, and other nearby areas
    3 unique versions available
  19. 1958 Map of Santa Rosa, 1968 Print
    1958 Map of Santa Rosa, 1968 Print
    1958 Santa Rosa
    1968 Print · USGS
    Covers Union, including Santa Rosa, Concord, and other nearby areas
    3 unique versions available
  22. 1962 Map of Santa Rosa
    1962 Map of Santa Rosa
    1962 Santa Rosa
    1962 Print · USGS
    Covers Union, including Santa Rosa, Concord, and other nearby areas
  25. 1964 Map of Santa Rosa
    1964 Map of Santa Rosa
    1964 Santa Rosa
    1964 Print · USGS
    Covers Union, including Santa Rosa, Concord, and other nearby areas
  28. 1983 Map of Napa
    1983 Map of Napa
    1983 Napa
    1983 Print · USGS
    Covers Union, including Santa Rosa, Concord, and other nearby areas
End of results
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Frequently asked questions

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