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1900s (20th Century) Maps of Frederick, Colorado

Explore 19 historic maps of Frederick 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 Frederick'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 Frederick's history through authentic maps from the 1900s. This is your window into the past.

Frederick, CO maps

(19)
  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. 1904 Map of Niwot
    1904 Map of Niwot
    1904 Niwot
    1904 Print · USGS
    The northern Colorado plains come alive in the early 1900s, showcasing a landscape shaped by coal mining and extensive irrigation. Genealogists and historians can trace family roots through settlements like Hygiene, Niwot, and Erie, or locate industrial sites such as Dixon Mill and the Gladstone Mine.
    3 unique versions available
  7. 1949 Map of Gowanda, 1957 Print
    1949 Map of Gowanda, 1957 Print
    1949 Gowanda
    1957 Print · USGS
    Weld County’s mid-century farming landscape is captured here, showing the intricate water and rail networks before modern development altered the valley. Genealogists and historians can trace local landmarks like the Rinn Valley Grange, Stone School, and the Union Pacific rail corridor.
    6 unique versions available
  10. 1950 Map of Frederick
    1950 Map of Frederick
    1950 Frederick
    1950 Print · USGS
    The 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
  13. 1950 Map of Gowanda
    1950 Map of Gowanda
    1950 Gowanda
    1950 Print · USGS
    Weld County farming and rail communities thrive along the river bottom in the years following the war. Researchers can locate the Pearl Howlett School, trace the Great Western tracks, and identify family landmarks like the Rinn Valley Grange.
    2 unique versions available
  16. 1950 Map of Erie, 1956 Print
    1950 Map of Erie, 1956 Print
    1950 Erie
    1956 Print · USGS
    In the mid-century landscape of the Colorado plains, coal mining and irrigation dictate the growth of towns and transport. Genealogists can trace family roots through markers like the Columbine Mine, Gooding School, and Erie Cem.
  19. 1950 Map of Longmont, 1960 Print
    1950 Map of Longmont, 1960 Print
    1950 Longmont
    1960 Print · USGS
    Longmont and the surrounding plains of Boulder and Weld Counties appear here at the mid-century, defined by a massive network of irrigation ditches and vital rail lines. Genealogists can trace family roots through several local burial grounds like Mountain View Cemetery or locate rural landmarks such as Dixons Mills and Liberty Hall Grange.
    2 unique versions available
  22. 1951 Map of Erie
    1951 Map of Erie
    1951 Erie
    1951 Print · USGS
    The mining and agricultural corridor of Weld and Boulder counties is captured here in the early 1950s. Researchers can trace dozens of individual operations like the Morrison Mine and Erie Mine, or locate family sites near the Gooding School and Erie Cemetery.
  25. 1951 Map of Longmont
    1951 Map of Longmont
    1951 Longmont
    1951 Print · USGS
    The agricultural plains of Boulder and Weld Counties are captured here in the early fifties as the town of Longmont expanded. Researchers can trace rural landmarks like the Liberty Hall Grange, Dixons Mills, and several family cemeteries and schools.
  28. 1954 Map of Greeley, 1966 Print
    1954 Map of Greeley, 1966 Print
    1954 Greeley
    1966 Print · USGS
    Northern 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
  31. 1957 Map of Greeley
    1957 Map of Greeley
    1957 Greeley
    1957 Print · USGS
    Northern 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.
  34. 1958 Map of Greeley
    1958 Map of Greeley
    1958 Greeley
    1958 Print · USGS
    Northern 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.
  37. 1961 Map of Greeley
    1961 Map of Greeley
    1961 Greeley
    1961 Print · USGS
    Northern 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.
  40. 1964 Map of Greeley
    1964 Map of Greeley
    1964 Greeley
    1964 Print · USGS
    The Front Range corridor and high peaks of the Rockies appear here in the mid-1960s, showing the intersection of mountain wilderness and plains agriculture. Trace the rail routes of the Great Western RR or locate landmarks like Longs Peak and Horsetooth Reservoir.
  43. 1965 Map of Greeley
    1965 Map of Greeley
    1965 Greeley
    1965 Print · USGS
    Northern Colorado in the mid-sixties shows a landscape defined by high mountain summits and the growing irrigation networks of the plains. Genealogists and historians can trace rail-side towns like Wellington or follow the early tracks of the Union Pacific Railroad past Longs Peak.
  46. 1967 Map of Erie, 1968 Print
    1967 Map of Erie, 1968 Print
    1967 Erie
    1968 Print · USGS
    The northern Front Range comes alive in this late 1960s survey of the coal and rail corridors between Weld and Boulder Counties. Genealogists and historians can trace the early footprints of Erie and Lafayette, alongside landmarks like the Columbine Mine and the Mountain View Drag Strip.
    6 unique versions available
  49. 1968 Map of Longmont
    1968 Map of Longmont
    1968 Longmont
    1968 Print · USGS
    Longmont and the surrounding farm country are captured here in the late sixties, highlighting the vital irrigation networks of the Colorado plains. Researchers can trace family roots at Burlington Cem, locate the old Grange Hall, or map the paths of the Chicago Burlington and railroad.
    6 unique versions available
  52. 1982 Map of Greeley, 1983 Print
    1982 Map of Greeley, 1983 Print
    1982 Greeley
    1983 Print · USGS
    North-central Colorado is shown in the early eighties as a thriving hub of river-valley agriculture and energy production. Researchers can trace the water-rights history and rail networks connecting Greeley to the Spindle Oil Field and Fort Lupton.
  55. 1984 Map of Estes Park
    1984 Map of Estes Park
    1984 Estes Park
    1984 Print · USGS
    The northern Front Range and high peaks come into focus during the mid-eighties, showing the intersection of mountain wilderness and urban expansion. Trace the rail lines of the Union Pacific, the shores of Lake Granby, and historic mountain towns like Gold Hill or Eldora.
    3 unique versions available
End of results
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