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1940s Maps of Monroe County, Illinois

Explore 8 historic maps of Monroe 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 Monroe 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 Monroe County's history through authentic maps from the 1940s. This is your window into the past.

Monroe County, IL maps

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  1. 1940 Map of Cahokia
    1940 Map of Cahokia
    1940 Cahokia
    1940 Print · USGS
    The industrial riverfront south of St Louis thrived in the early twentieth century as a massive rail and shipping hub. Trace the development of Cahokia and Dupo or locate landmarks like the U S Marine Hospital and the Lark Cem.
    3 unique versions available
  4. 1940 Map of Renault, 1955 Print
    1940 Map of Renault, 1955 Print
    1940 Renault
    1955 Print · USGS
    The Illinois-Missouri borderlands come to life in the 1940s, highlighting the river-driven economy and rural community structure of the Mississippi valley. Genealogists can trace family footprints through dozens of local landmarks, from the Ruma Convent to historic schoolhouses like Yankeetown School and Foster School.
    2 unique versions available
  7. 1941 Map of Jefferson Barracks
    1941 Map of Jefferson Barracks
    1941 Jefferson Barracks
    1941 Print · USGS
    The suburbs south of St. Louis were maturing into a dense network of rail-side towns and institutions just before the mid-century. Genealogists and historians can trace family roots through numerous sites like Grants Farm, National Cemetery, and Webster College.
    3 unique versions available
  10. 1942 Map of Baldwin, 1960 Print
    1942 Map of Baldwin, 1960 Print
    1942 Baldwin
    1960 Print · USGS
    Mid-century southwestern Illinois reveals a landscape of river-bend settlements and extensive rail networks. Genealogists can locate many local landmarks like Jordan Grove School, the Mobile and Ohio rail line, and the village of Evansville along the Kaskaskia River.
  13. 1948 Map of Kimmswick, 1955 Print
    1948 Map of Kimmswick, 1955 Print
    1948 Kimmswick
    1955 Print · USGS
    The Mississippi River corridor south of St. Louis appears here at a mid-century peak of rail and river industry. Researchers can trace historic river landings and rural schools like Harrisonville Landing, Blue Church, and the sprawling grounds of Jefferson Barracks.
  16. 1949 Map of Saint Louis
    1949 Map of Saint Louis
    1949 Saint Louis
    1949 Print · USGS
    Greater St. Louis and its surrounding river valleys are captured here just after the war, showing the metropolitan core and the rural Ozark fringe. Researchers can trace the sprawling rail network of the Wabash RR or locate landmarks like Meramec Caverns Airport and Scott Air Force Base.
    2 unique versions available
  19. 1949 Map of Cahokia, 1954 Print
    1949 Map of Cahokia, 1954 Print
    1949 Cahokia
    1954 Print · USGS
    Mid-century development and heavy industry define this riverfront region as St. Louis expands toward the Illinois rail yards. Researchers can trace the heritage of Dupo and Cahokia, locate St Josephs Cem, or find industrial landmarks like Monsanto.
    2 unique versions available
  22. 1949 Map of Crystal City, 1959 Print
    1949 Map of Crystal City, 1959 Print
    1949 Crystal City
    1959 Print · USGS
    The Mississippi River valley comes alive in the late 1940s, showing the industrial pulse of Festus and the rural reaches of Jefferson County. Genealogists can locate numerous vanished landmarks like the Telegraph School, Valle Mines, and the Rush Tower river landing.
    2 unique versions available
End of results
Showing maps 1-8 of 8

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Frequently asked questions

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