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1900s (20th Century) Maps of Union, Illinois

Explore 7 historic maps of Union 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 Union'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 Union's history through authentic maps from the 1900s. This is your window into the past.

Union, IL maps

(7)
  1. 1938 Map of Genoa
    1938 Map of Genoa
    1938 Genoa
    1938 Print · USGS
    Northern Illinois farm country and rail junctions thrive in the late 1930s across the borders of De Kalb and McHenry counties. Genealogists can locate dozens of rural landmarks, from North Kingston Cem and Ney Ch to many local schools like Genoa Center Sch.
    3 unique versions available
  4. 1954 Map of Rockford
    1954 Map of Rockford
    1954 Rockford
    1954 Print · USGS
    The Rock River valley and the Illinois-Wisconsin borderlands are captured here in the mid-1950s during a period of robust industrial and agricultural activity. Genealogists and historians can trace rail-era corridors like the Illinois Central RR and locate landmarks from Big Foot Prairie to Lake Geneva.
  7. 1955 Map of Rockford
    1955 Map of Rockford
    1955 Rockford
    1955 Print · USGS
    The Rock River valley and southern Wisconsin dairy country are shown here in the mid-fifties as the region's manufacturing centers grew. Genealogists and historians can trace the paths of the Chicago and North Western RR and Illinois Central RR through hubs like Rockford and Beloit.
  10. 1958 Map of Rockford, 1974 Print
    1958 Map of Rockford, 1974 Print
    1958 Rockford
    1974 Print · USGS
    Northern Illinois and southern Wisconsin are shown here in the mid-twentieth century as rail-dependent industrial towns began to interface with growing lakefront communities. Genealogists can trace family roots through settlements like Saylesville and Tess Corners or locate historical landmarks like the Rockford Ordnance Depot.
    4 unique versions available
  13. 1963 Map of Rockford
    1963 Map of Rockford
    1963 Rockford
    1963 Print · USGS
    The mid-century industrial corridor along the Rock River is shown here during a period of rapid post-war growth. Researchers can trace the extensive rail lines of the Chicago and North Western or locate local landmarks like the Rockford Ordnance Depot and Holy Hill.
  16. 1968 Map of Marengo South, 1970 Print
    1968 Map of Marengo South, 1970 Print
    1968 Marengo South
    1970 Print · USGS
    In the late sixties, the rural borderlands of McHenry, DeKalb, and Kane Counties were undergoing change as modern highways intersected old rail lines. Genealogists and local historians can trace family-named roads and sites like Coral Cem, Union Ch, and the Tollgate near Harmony.
    2 unique versions available
  19. 1981 Map of Elgin
    1981 Map of Elgin
    1981 Elgin
    1981 Print · USGS
    Northern Illinois and southern Wisconsin are shown in the early eighties as suburban growth meets glacial terrain. Trace the paths of the Milwaukee Road through Harvard or explore the wetlands of Volo Bog State Natural Area.
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?
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  • 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?