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Old Maps of Union Township, Iowa for Academic Research

Study the evolution of Union Township with 25 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 Township has changed over the decades.

Union Township, IA maps

(25)
  1. 1909 Map of Knoxville, 1958 Print
    1909 Map of Knoxville, 1958 Print
    1909 Knoxville
    1958 Print · USGS
    Marion County at the start of the twentieth century is a landscape defined by its river valleys and dense network of country schools. Genealogists and historians can trace family roots through dozens of named landmarks like Stringtown School, Mt Vernon Church, and the river town of Red Rock.
  4. 1912 Map of Knoxville
    1912 Map of Knoxville
    1912 Knoxville
    1912 Print · USGS
    Marion County at the dawn of the twentieth century was a landscape of bustling rail towns and river crossings. Genealogists can trace the exact locations of dozens of rural schoolhouses and churches like Stringtown School and Mt Vernon Church alongside the Des Moines River.
    2 unique versions available
  7. 1954 Map of Des Moines, 1973 Print
    1954 Map of Des Moines, 1973 Print
    1954 Des Moines
    1973 Print · USGS
    Central Iowa's evolving landscape is captured here in the early seventies, just as major reservoirs were reshaping the river valleys. Genealogists and historians can trace the rail corridors of the Burlington Northern or locate family roots near Pella, Indianola, and Knoxville.
    2 unique versions available
  10. 1956 Map of Des Moines
    1956 Map of Des Moines
    1956 Des Moines
    1956 Print · USGS
    Central Iowa in the mid-fifties shows a landscape defined by bustling rail hubs and deep-rooted agricultural research. Genealogists and researchers can trace the growth of Des Moines and Ames, locate the Sac and Fox Indian Reservation, or study the paths of the Skunk River and South Skunk River.
  13. 1957 Map of Des Moines
    1957 Map of Des Moines
    1957 Des Moines
    1957 Print · USGS
    Central Iowa's post-war landscape is defined here by the converging rail lines and river valleys that shaped its earliest settlements. Genealogists and historians can trace the paths of the Rock Island Railroad and locate community landmarks in Des Moines, Ames, and Newton.
  16. 1965 Map of Knoxville NW, 1966 Print
    1965 Map of Knoxville NW, 1966 Print
    1965 Knoxville NW
    1966 Print · USGS
    The Des Moines River valley in Marion County is captured here just as the landscape was being reshaped by the reservoir. Genealogists and local historians can locate several burial sites, including Dunreath Cem and Rees Cem, alongside an Old Railroad Grade and numerous creek beds.
  19. 1965 Map of Otley, 1966 Print
    1965 Map of Otley, 1966 Print
    1965 Otley
    1966 Print · USGS
    Marion County underwent a massive transformation in the mid-sixties as the Des Moines River valley prepared for the rising waters of Red Rock Lake. Researchers can trace the original landscape through family cemeteries like Ruckman Cem and the small settlement of Teter.
    2 unique versions available
  22. 1965 Map of Knoxville SW, 1966 Print
    1965 Map of Knoxville SW, 1966 Print
    1965 Knoxville SW
    1966 Print · USGS
    Marion County comes into focus in the mid-sixties as the newly formed waters of Lake Red Rock reshape the landscape. Researchers can trace the legacy of early settlers and miners at Lincoln Cem, the village of Donnelley, and several local Strip Mines.
  25. 1969 Map of Des Moines
    1969 Map of Des Moines
    1969 Des Moines
    1969 Print · USGS
    Central Iowa's fertile plains and growing capital are captured here during the late sixties, a time of major highway expansion and reservoir construction. Genealogists and researchers can trace rural township boundaries, local cemeteries, and rail lines serving towns like Pella, Grinnell, and Oskaloosa.
  28. 1984 Map of Indianola
    1984 Map of Indianola
    1984 Indianola
    1984 Print · USGS
    South-central Iowa in the mid-1980s reveals a patchwork of established rail hubs and significant new conservation areas. Trace the Chicago and North Western rail lines and explore rural landmarks like Lake Ahquabi State Park or the Strip Mine near Knoxville.
  31. 2010 Map of Otley, 2010 Print
    2010 Map of Otley, 2010 Print
    2010 Otley
    2010 Print · USGS
    Covers Union Township, including Summit Township, Knoxville Township, and other nearby areas
  34. 2010 Map of Knoxville SW, 2010 Print
    2010 Map of Knoxville SW, 2010 Print
    2010 Knoxville SW
    2010 Print · USGS
    Covers Union Township, including Knoxville, Franklin Township, and other nearby areas
  37. 2010 Map of Knoxville NW, 2010 Print
    2010 Map of Knoxville NW, 2010 Print
    2010 Knoxville NW
    2010 Print · USGS
    Covers Union Township, including Knoxville Township, Red Rock Township, and other nearby areas
  40. 2013 Map of Knoxville NW, 2013 Print
    2013 Map of Knoxville NW, 2013 Print
    2013 Knoxville NW
    2013 Print · USGS
    Covers Union Township, including Knoxville Township, Red Rock Township, and other nearby areas
  43. 2013 Map of Knoxville SW, 2013 Print
    2013 Map of Knoxville SW, 2013 Print
    2013 Knoxville SW
    2013 Print · USGS
    Covers Union Township, including Knoxville, Franklin Township, and other nearby areas
  46. 2013 Map of Otley, 2013 Print
    2013 Map of Otley, 2013 Print
    2013 Otley
    2013 Print · USGS
    Covers Union Township, including Summit Township, Knoxville Township, and other nearby areas
  49. 2015 Map of Otley, 2015 Print
    2015 Map of Otley, 2015 Print
    2015 Otley
    2015 Print · USGS
    Covers Union Township, including Summit Township, Knoxville Township, and other nearby areas
  52. 2015 Map of Knoxville SW, 2015 Print
    2015 Map of Knoxville SW, 2015 Print
    2015 Knoxville SW
    2015 Print · USGS
    Covers Union Township, including Knoxville, Franklin Township, and other nearby areas
  55. 2015 Map of Knoxville NW, 2015 Print
    2015 Map of Knoxville NW, 2015 Print
    2015 Knoxville NW
    2015 Print · USGS
    Covers Union Township, including Knoxville Township, Red Rock Township, and other nearby areas
  58. 2018 Map of Otley, 2018 Print
    2018 Map of Otley, 2018 Print
    2018 Otley
    2018 Print · USGS
    Covers Union Township, including Summit Township, Knoxville Township, and other nearby areas
  61. 2018 Map of Knoxville SW, 2018 Print
    2018 Map of Knoxville SW, 2018 Print
    2018 Knoxville SW
    2018 Print · USGS
    Covers Union Township, including Knoxville, Franklin Township, and other nearby areas
  64. 2018 Map of Knoxville NW, 2018 Print
    2018 Map of Knoxville NW, 2018 Print
    2018 Knoxville NW
    2018 Print · USGS
    Covers Union Township, including Knoxville Township, Red Rock Township, and other nearby areas
  67. 2022 Map of Knoxville SW, 2022 Print
    2022 Map of Knoxville SW, 2022 Print
    2022 Knoxville SW
    2022 Print · USGS
    Marion County southwest of Knoxville is shown here in the 2020s, where the rural prairie landscape meets growing residential developments. Genealogists can trace several historic burial grounds including Stickle Cem, Poor Farm Cem, and Watkins Cem.
  70. 2022 Map of Knoxville NW, 2022 Print
    2022 Map of Knoxville NW, 2022 Print
    2022 Knoxville NW
    2022 Print · USGS
    Marion County's river valley and rural uplands are shown in detail as they appeared in the early twenty-first century. Genealogists and local historians can trace legacy land markers like Dunreath Cem and Rees Cem near the shores of Lake Red Rock.
  73. 2022 Map of Otley, 2022 Print
    2022 Map of Otley, 2022 Print
    2022 Otley
    2022 Print · USGS
    Marion County is captured here at the beginning of the 2020s, dominated by the waters of Lake Red Rock and the village of Otley. Genealogists can trace numerous family burial grounds like Pendroy Cem, Mikesell Cem, and Fisher Cem across the rural landscape.
End of results
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Frequently asked questions

  • What are the different types of historical maps available for Union Township?
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