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1900s (20th Century) Maps of Warren County, Missouri

Explore 37 historic maps of Warren County from the 1900s (20th Century). These maps offer a rare glimpse into what life looked like during the 1900s — 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 Warren County's landscape evolved across the 1900s, 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 1900s, 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 Warren County's history through authentic maps from the 1900s. This is your window into the past.

Warren County, MO maps

(37)
  1. 1903 Map of O'Fallon
    1903 Map of O'Fallon
    1903 O'Fallon
    1903 Print · USGS
    Covers Warren County, including O'Fallon, Saint Charles, and other nearby areas
    5 unique versions available
  4. 1936 Map of Hermann
    1936 Map of Hermann
    1936 Hermann
    1936 Print · USGS
    Covers Warren County, including Hermann, Berger, and other nearby areas
  7. 1941 Map of Troy, 1964 Print
    1941 Map of Troy, 1964 Print
    1941 Troy
    1964 Print · USGS
    Covers Warren County, including O'Fallon, Wentzville, and other nearby areas
    2 unique versions available
  10. 1942 Map of Hermann, 1961 Print
    1942 Map of Hermann, 1961 Print
    1942 Hermann
    1961 Print · USGS
    Covers Warren County, including Hermann, Berger, and other nearby areas
    2 unique versions available
  13. 1942 Map of New Florence, 1963 Print
    1942 Map of New Florence, 1963 Print
    1942 New Florence
    1963 Print · USGS
    Covers Warren County, including Montgomery City, New Florence, and other nearby areas
    2 unique versions available
  16. 1943 Map of Warrenton, 1962 Print
    1943 Map of Warrenton, 1962 Print
    1943 Warrenton
    1962 Print · USGS
    Covers Warren County, including Troy, Warrenton, and other nearby areas
    2 unique versions available
  19. 1945 Map of Troy
    1945 Map of Troy
    1945 Troy
    1945 Print · USGS
    Covers Warren County, including O'Fallon, Wentzville, and other nearby areas
    2 unique versions available
  22. 1945 Map of Hermann
    1945 Map of Hermann
    1945 Hermann
    1945 Print · USGS
    Covers Warren County, including Hermann, Berger, and other nearby areas
    2 unique versions available
  25. 1945 Map of Warrenton
    1945 Map of Warrenton
    1945 Warrenton
    1945 Print · USGS
    Covers Warren County, including Troy, Warrenton, and other nearby areas
    2 unique versions available
  28. 1946 Map of New Florence
    1946 Map of New Florence
    1946 New Florence
    1946 Print · USGS
    Covers Warren County, including Montgomery City, New Florence, and other nearby areas
    2 unique versions available
  31. 1948 Map of Washington, 1962 Print
    1948 Map of Washington, 1962 Print
    1948 Washington
    1962 Print · USGS
    Covers Warren County, including Washington, New Haven, and other nearby areas
    2 unique versions available
  34. 1948 Map of Augusta, 1963 Print
    1948 Map of Augusta, 1963 Print
    1948 Augusta
    1963 Print · USGS
    Covers Warren County, including O'Fallon, Washington, and other nearby areas
    2 unique versions available
  37. 1949 Map of Saint Louis
    1949 Map of Saint Louis
    1949 Saint Louis
    1949 Print · USGS
    Covers Warren County, including St. Louis, O'Fallon, and other nearby areas
    2 unique versions available
  40. 1949 Map of Washington
    1949 Map of Washington
    1949 Washington
    1949 Print · USGS
    Covers Warren County, including Washington, New Haven, and other nearby areas
    2 unique versions available
  43. 1949 Map of Augusta
    1949 Map of Augusta
    1949 Augusta
    1949 Print · USGS
    Covers Warren County, including O'Fallon, Washington, and other nearby areas
    2 unique versions available
  46. 1962 Map of St. Louis
    1962 Map of St. Louis
    1962 St. Louis
    1962 Print · USGS
    Covers Warren County, including St. Louis, O'Fallon, and other nearby areas
  49. 1963 Map of St. Louis, 1970 Print
    1963 Map of St. Louis, 1970 Print
    1963 St. Louis
    1970 Print · USGS
    Covers Warren County, including St. Louis, O'Fallon, and other nearby areas
    4 unique versions available
  52. 1966 Map of St. Louis
    1966 Map of St. Louis
    1966 St. Louis
    1966 Print · USGS
    Covers Warren County, including St. Louis, O'Fallon, and other nearby areas
  55. 1972 Map of Foristell, 1973 Print
    1972 Map of Foristell, 1973 Print
    1972 Foristell
    1973 Print · USGS
    Covers Warren County, including Wentzville, Wright City, and other nearby areas
    3 unique versions available
  58. 1972 Map of Washington East, 1973 Print
    1972 Map of Washington East, 1973 Print
    1972 Washington East
    1973 Print · USGS
    Covers Warren County, including Washington, Augusta, and other nearby areas
  61. 1972 Map of New Melle, 1973 Print
    1972 Map of New Melle, 1973 Print
    1972 New Melle
    1973 Print · USGS
    Covers Warren County, including New Melle, Cappeln, and other nearby areas
    2 unique versions available
  64. 1972 Map of Wright City, 1974 Print
    1972 Map of Wright City, 1974 Print
    1972 Wright City
    1974 Print · USGS
    Covers Warren County, including Warrenton, Wright City, and other nearby areas
    2 unique versions available
  67. 1972 Map of Marthasville, 1975 Print
    1972 Map of Marthasville, 1975 Print
    1972 Marthasville
    1975 Print · USGS
    Covers Warren County, including Marthasville, Innsbrook, and other nearby areas
    2 unique versions available
  70. 1973 Map of Hawk Point, 1974 Print
    1973 Map of Hawk Point, 1974 Print
    1973 Hawk Point
    1974 Print · USGS
    Covers Warren County, including Hawk Point, Truxton, and other nearby areas
    2 unique versions available
  73. 1973 Map of Warrenton, 1974 Print
    1973 Map of Warrenton, 1974 Print
    1973 Warrenton
    1974 Print · USGS
    Covers Warren County, including Warrenton, Truesdale, and other nearby areas
    2 unique versions available
Showing maps 1-25 of 37

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Frequently asked questions

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