1900s (20th Century) Maps of Thornton, Colorado
Explore 34 historic maps of Thornton 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 Thornton'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 Thornton's history through authentic maps from the 1900s. This is your window into the past.
Thornton, CO maps
(34)- 1902 Map of Greeley
1902 Greeley1902 Print · USGSThe 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 - 1938 Map of Derby, 1955 Print
1938 Derby1955 Print · USGSThe 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. - 1940 Map of Eastlake
1940 Eastlake1940 Print · USGSAdams 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. - 1940 Map of Lafayette
1940 Lafayette1940 Print · USGSLafayette 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. - 1940 Map of Derby
1940 Derby1940 Print · USGSAdams 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 - 1941 Map of Arvada
1941 Arvada1941 Print · USGSThe 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. - 1944 Map of Arvada
1944 Arvada1944 Print · USGSThe 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. - 1944 Map of Lafayette
1944 Lafayette1944 Print · USGSThe 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. - 1944 Map of Eastlake
1944 Eastlake1944 Print · USGSThe 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. - 1947 Map of Derby
1947 Derby1947 Print · USGSDenver'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 - 1950 Map of Frederick
1950 Frederick1950 Print · USGSThe coal-rich corridor of Weld County is caught in a moment of industrial transition during the early 1950s. Genealogists and historians can trace the mining family hubs of Frederick, Firestone, and Dacono, alongside local schools like Mount View School and the Shamrock Mine.7 unique versions available - 1950 Map of Derby
1950 Derby1950 Print · USGSThe northern reaches of Denver and Adams County are captured here at mid-century as industry and rail lines shaped the river valley. Researchers can trace the early footprints of Adams City, the Stockyards, and family history at Riverside Cemetery or Rose Hill Cem. - 1950 Map of Arvada
1950 Arvada1950 Print · USGSMid-century Jefferson County comes to life as Denver’s western edge begins its suburban transformation from a landscape of irrigation ditches and small farms. Researchers can trace the original footprints of Arvada, Wheatridge, and local landmarks like the Crown Hill Cemetery and Regis College. - 1953 Map of Denver, 1964 Print
1953 Denver1964 Print · USGSDenver and the Colorado Front Range are captured here during a decade of post-war growth and military expansion. Researchers can trace the sprawling rail lines of the Union Pacific, locate the State Capitol, and explore historic mountain mining hubs like Central City.6 unique versions available - 1954 Map of Greeley, 1966 Print
1954 Greeley1966 Print · USGSNorthern Colorado transitions from high-alpine peaks to the irrigated South Platte valley during this mid-century period of growth. Genealogists and historians can trace rail-connected hubs like Greeley and Longmont alongside landmarks like Horsetooth Reservoir and Estes Park.3 unique versions available - 1956 Map of Lafayette, 1958 Print
1956 Lafayette1958 Print · USGSBoulder County experiences a post-war transition in the mid-fifties as the new turnpike and traditional mining industries coexist. Researchers can trace early suburban expansion in Broomfield Heights while locating the Centennial Mine and local landmarks like Ruston Heights Airport. - 1957 Map of Denver
1957 Denver1957 Print · USGSDenver and the Colorado Front Range are seen here during a mid-century period of intense military and urban expansion. Trace the footprints of the Rocky Mountain Arsenal, the early United States Air Force Academy, and the Lowry AF Base. - 1957 Map of Greeley
1957 Greeley1957 Print · USGSNorthern Colorado in the mid-fifties is captured here as the agricultural plains of Weld County meet the high peaks of the Front Range. Genealogists and historians can trace rail-linked towns like Keenesburg and Roggen or locate early water features such as Boyd Lake and Fossil Creek Reservoir. - 1957 Map of Derby, 1958 Print
1957 Derby1958 Print · USGSNortheast of Denver during the late fifties, this area was a bustling hub of rail transport, aviation, and emerging suburbs. Genealogists and historians can trace the foundations of Thornton or locate family plots in Riverside Cemetery and Rose Hill Cem.3 unique versions available - 1957 Map of Eastlake, 1958 Print
1957 Eastlake1958 Print · USGSAdams County’s farming and irrigation heartland is frozen in time in the late fifties, just as the metropolitan area began its northward shift. Researchers can trace historic water rights and small-town roots through landmarks like Eastlake, the Wesley Cem, and the Union Pacific rail siding at Hazeltine.2 unique versions available - 1957 Map of Arvada, 1958 Print
1957 Arvada1958 Print · USGSThe northwest Denver suburbs are caught in a moment of post-war transformation, balancing old canal-fed agriculture with new residential growth. Local historians can trace established landmarks like Elitch Gardens, Regis College, and the sprawling Crown Hill Cemetery.3 unique versions available - 1958 Map of Greeley
1958 Greeley1958 Print · USGSNorthern Colorado and the high peaks of the Front Range appear here in the mid-fifties as the region's agricultural and rail networks were fully established. Genealogists can locate family homes near Virginia Dale, Waverly, or Kuner, and trace the path of the Union Pacific Railroad through Greeley. - 1958 Map of Denver
1958 Denver1958 Print · USGSDenver and the Colorado Front Range are captured here during the mid-century suburban boom. Trace the footprints of military installations like Buckley Air Force Base alongside the established rail networks of the Colorado & Southern Ry. - 1960 Map of Denver
1960 Denver1960 Print · USGSDenver and the Colorado Front Range are seen here at a pivotal moment of postwar expansion into the plains and foothills. Researchers can trace the mid-century rail network of the Denver & Rio Grande Western RR and locate historic institutional landmarks like Buckley Field and the Colorado School of Mines. - 1961 Map of Greeley
1961 Greeley1961 Print · USGSNorthern Colorado's transition from high mountain peaks to irrigated plains is captured here just as the post-war population boom reached the Front Range. Researchers can trace early water infrastructure and rail lines like the Great Western RR connecting sugar beet hubs from Fort Collins to Greeley.
Showing maps 1-25 of 34
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