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1900s (20th Century) Maps of Adams County, Colorado

Explore 113 historic maps of Adams 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 Adams 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 Adams County's history through authentic maps from the 1900s. This is your window into the past.

Adams County, CO maps

(113)
  1. 1902 Map of Greeley
    1902 Map of Greeley
    1902 Greeley
    1902 Print · USGS
    The northern Colorado plains come alive in this survey of the South Platte and Cache la Poudre river valleys. Researchers can trace early railroad expansion and irrigation networks while locating specific homesteads like Klugs Ranch and old coal operations such as the Black Prince Coal Mine.
    4 unique versions available
  4. 1935 Map of East Denver Nos. 3 and 4
    1935 Map of East Denver Nos. 3 and 4
    1935 East Denver Nos. 3 and 4
    1935 Print · USGS
    Southeast Denver and the surrounding High Plains are captured here in the mid-1930s as residential growth began to push into Douglas County. Researchers can locate early landmarks like Fairmount Cemetery, the settlement of Sullivan, and the Melvin Sch.
  7. 1938 Map of Derby, 1955 Print
    1938 Map of Derby, 1955 Print
    1938 Derby
    1955 Print · USGS
    The industrial and aviation landscape north of Denver is captured here during the late Depression era, showing a transition from dense urban rail hubs to irrigated farmland. Researchers can trace the legacy of the Stockyards, the Riverside Cemetery, and early runways at the Municipal Airport.
  10. 1938 Map of Long Branch, 1957 Print
    1938 Map of Long Branch, 1957 Print
    1938 Long Branch
    1957 Print · USGS
    The outskirts of Denver in the late 1930s reveal a landscape of military installations, rail lines, and irrigation works. Trace the early boundaries of Aurora and locate local landmarks like Rose Hill Sch and Fitzsimons General Hospital.
  13. 1939 Map of Coal Creek, 1955 Print
    1939 Map of Coal Creek, 1955 Print
    1939 Coal Creek
    1955 Print · USGS
    The rural boundary of Arapahoe and Adams counties is captured here in the late 1930s, showing the high plains before urban expansion. Genealogists and local historians can trace the paths of Airline Road and the Union Pacific railroad, or find the site of the old Coal Creek Sch.
  16. 1940 Map of Brighton
    1940 Map of Brighton
    1940 Brighton
    1940 Print · USGS
    The irrigated farmlands of Adams County come to life in this pre-war survey of the South Platte Valley. Genealogists and local historians can trace the footprint of the Denver Poor Farm and old rural schools like Pleasant Plains Sch or Cactus Ridge School.
  19. 1940 Map of Englewood
    1940 Map of Englewood
    1940 Englewood
    1940 Print · USGS
    Before the postwar boom, South Denver and Englewood were a landscape of grand country clubs and critical water infrastructure. Trace the early boundaries of Lowry Field Military Reservation and historic sites like Sullivan and the University of Denver.
  22. 1940 Map of Eastlake
    1940 Map of Eastlake
    1940 Eastlake
    1940 Print · USGS
    Adams County at the end of the 1930s shows a landscape of rail-side settlements and intensive irrigation. Genealogists can locate family landmarks like Wesley Chapel, rural school sites such as Moreland Sch, and the water networks of the Brantner Ditch.
  25. 1940 Map of Lafayette
    1940 Map of Lafayette
    1940 Lafayette
    1940 Print · USGS
    Lafayette and the northern Colorado coalfields are captured in the late 1930s as mining and rail transport shaped the local economy. Genealogists can trace family roots through named landmarks like Mandalay Sch, Lakeview Cem, and the Centennial Mine.
  28. 1940 Map of Derby
    1940 Map of Derby
    1940 Derby
    1940 Print · USGS
    Adams County and north Denver appear here on the eve of World War II, showing a landscape of irrigation ditches, heavy rail, and early aviation. Researchers can trace the legacy of the Stockyards, the sprawling Denver City and Co Airport, and vanished local schools like Mapleton Sch.
    2 unique versions available
  31. 1941 Map of Long Branch
    1941 Map of Long Branch
    1941 Long Branch
    1941 Print · USGS
    The high plains of Adams County were undergoing a period of vital irrigation and military growth just before the mid-century. Researchers can trace the early layout of Aurora, the massive Fitzsimons General Hospital campus, and the rural rail stops at Sable and Irondale.
  34. 1941 Map of Fitzsimons
    1941 Map of Fitzsimons
    1941 Fitzsimons
    1941 Print · USGS
    Arapahoe County was a landscape of military expansion and rural education just before the war. Trace the early boundaries of the Fitzsimons General Hospital and find local landmarks like Pleasant View Sch and the High Line Canal.
    2 unique versions available
  37. 1941 Map of Arvada
    1941 Map of Arvada
    1941 Arvada
    1941 Print · USGS
    The Arvada and Westminster areas of the Colorado Front Range appear here in the early 1940s, showing a landscape defined by irrigation and rail. Researchers can trace historic institutions like Bellevue College, early settlements at Utah Junction, and the Leyden Narrow Gage railroad.
  40. 1942 Map of Mile High Lakes
    1942 Map of Mile High Lakes
    1942 Mile High Lakes
    1942 Print · USGS
    Adams County ranching and water engineering are on full display in the early 1940s, as a network of canals transformed the High Plains. Genealogists and local historians can trace legacy holdings like Patton Ranch and Miliken Ranch or locate the vital Klink Siding along the railroad.
  43. 1942 Map of Box Elder School
    1942 Map of Box Elder School
    1942 Box Elder School
    1942 Print · USGS
    Adams County ranching and irrigation systems are in full view just before the mid-century, as the city of Denver begins to expand eastward. Trace the early rural school districts at Box Elder Sch and First Creek Sch or follow the path of the Highline Canal.
  46. 1942 Map of Coal Creek
    1942 Map of Coal Creek
    1942 Coal Creek
    1942 Print · USGS
    The Colorado high plains east of Denver show a landscape of intermittent streams and section-line roads in the late thirties. Genealogists and historians can locate the Coal Creek Sch and trace the path of the Union Pacific and Airline Road.
  49. 1944 Map of Arvada
    1944 Map of Arvada
    1944 Arvada
    1944 Print · USGS
    The northwest Denver suburbs appear as a series of distinct rail-connected towns in the 1940s. Genealogists can locate family landmarks like Arvada Cem, Semper Sch, and the grounds of Regis College.
  52. 1944 Map of Englewood
    1944 Map of Englewood
    1944 Englewood
    1944 Print · USGS
    Denver and its southern suburbs appear during a period of significant mid-century growth and military expansion. Genealogists and local historians can trace the early grids of Englewood, find the original University of Denver campus, or locate family plots in Fairmount Cemetery.
  55. 1944 Map of Lafayette
    1944 Map of Lafayette
    1944 Lafayette
    1944 Print · USGS
    The northern Front Range in the years following the Great Depression was a landscape of coal mines and intricate irrigation reservoirs. You can trace the early footprints of Lafayette and Broomfield while locating industrial landmarks like the Centennial Mine and Burn Lee Sch.
  58. 1944 Map of Brighton
    1944 Map of Brighton
    1944 Brighton
    1944 Print · USGS
    The agricultural heart of the South Platte Valley is captured here during the mid-forties as irrigation and railroads transformed the plains. Genealogists and local historians can trace the foundations of Brighton and find vanished sites like the Denver Poor Farm or Pleasant Plains Sch.
  61. 1944 Map of Eastlake
    1944 Map of Eastlake
    1944 Eastlake
    1944 Print · USGS
    The South Platte River valley and the agricultural plains of Adams County appear here in the years before the Denver suburbs arrived. Genealogists and historians can trace rural family life through locations like Wesley Chapel, the local Cemetery, and early school sites like Brantner Sch.
  64. 1947 Map of Derby
    1947 Map of Derby
    1947 Derby
    1947 Print · USGS
    Denver's northern periphery at the end of the 1930s reveals a landscape defined by industry and irrigation. Trace family roots at Riverside Cemetery or locate early landmarks like the Stockyards, Argo, and the Fish Hatchery.
    2 unique versions available
  67. 1948 Map of Long Branch
    1948 Map of Long Branch
    1948 Long Branch
    1948 Print · USGS
    East of Denver in the late 1940s, this area shows a landscape of military hospitals and emerging settlements tied to the rail lines. Trace the grounds of Fitzsimons General Hospital or follow the Highline Canal past Irondale and Sable.
  70. 1948 Map of Fitzsimons
    1948 Map of Fitzsimons
    1948 Fitzsimons
    1948 Print · USGS
    The eastern edges of Denver and Aurora were defined by major military installations and high-plains irrigation in the late 1940s. Genealogists and historians can trace the early development of Smoky Hill Park and the grounds of Fitzsimons General Hospital.
  73. 1949 Map of Sunnydale
    1949 Map of Sunnydale
    1949 Sunnydale
    1949 Print · USGS
    Sunnydale and the surrounding Adams County plains are captured here in the late forties during a period of Missouri River Basin development. Genealogists and local historians can locate the Sunnydale Sch, the Sunnydale Community House, and the path of the Henrylyn Canal (Abandoned).
    4 unique versions available
Showing maps 1-25 of 113

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Frequently asked questions

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