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1900s (20th Century) Maps of Duncan, Iowa

Explore 5 historic maps of Duncan 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 Duncan'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 Duncan's history through authentic maps from the 1900s. This is your window into the past.

Duncan, IA maps

(5)
  1. 1954 Map of Mason City, 1967 Print
    1954 Map of Mason City, 1967 Print
    1954 Mason City
    1967 Print · USGS
    Southern Minnesota and northern Iowa are shown here at the height of the mid-century rail era, centered on the regional hubs of Mason City and Rochester. Researchers can trace the vanished paths of the Chicago Great Western and find local landmarks like Pilot Knob and Bear Lake.
    2 unique versions available
  4. 1957 Map of Mason City
    1957 Map of Mason City
    1957 Mason City
    1957 Print · USGS
    The Minnesota-Iowa border region comes alive in this mid-century survey, from the industrial plants of Mason City to the medical hub of Rochester. Researchers can trace the rail-and-river economy through the Chicago Great Western Railway and the Shell Rock River.
  7. 1958 Map of Mason City
    1958 Map of Mason City
    1958 Mason City
    1958 Print · USGS
    Southern Minnesota and northern Iowa are shown during the mid-fifties when railroads still anchored the regional economy. Genealogists and historians can trace the intricate rail networks of the Illinois Central and find local landmarks in Mason City, Albert Lea, and Austin.
  10. 1972 Map of Duncan, 1975 Print
    1972 Map of Duncan, 1975 Print
    1972 Duncan
    1975 Print · USGS
    Hancock County farmland is shown here in the early 1970s, organized by the townships of Garfield and Liberty. You can trace the railroad through Duncan, locate family sites at St Boniface Cem, or explore the wetlands of Eagle Lake.
  13. 1985 Map of Mason City
    1985 Map of Mason City
    1985 Mason City
    1985 Print · USGS
    The Northern Iowa and Southern Minnesota borderlands are captured here in the mid-eighties, showing a region defined by agricultural drainage and rail heritage. Genealogists and historians can trace the grid of rural townships and find local landmarks like Pilot Knob State Park, Nora Springs, and Clear Lake State Park.
    2 unique versions available
End of results
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Frequently asked questions

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