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

Explore 72 historic maps of Boulder 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 Boulder 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 Boulder County's history through authentic maps from the 1900s. This is your window into the past.

Boulder County, CO maps

(72)
  1. 1902 Map of Boulder, 1957 Print
    1902 Map of Boulder, 1957 Print
    1902 Boulder
    1957 Print · USGS
    Covers Boulder County, including Boulder, Lyons, and other nearby areas
  4. 1904 Map of Niwot
    1904 Map of Niwot
    1904 Niwot
    1904 Print · USGS
    Covers Boulder County, including Boulder, Longmont, and other nearby areas
    3 unique versions available
  7. 1904 Map of Boulder
    1904 Map of Boulder
    1904 Boulder
    1904 Print · USGS
    Covers Boulder County, including Boulder, Lyons, and other nearby areas
    6 unique versions available
  10. 1905 Map of Central City
    1905 Map of Central City
    1905 Central City
    1905 Print · USGS
    Covers Boulder County, including Idaho Springs, Nederland, and other nearby areas
  13. 1905 Map of Mount Olympus, 1955 Print
    1905 Map of Mount Olympus, 1955 Print
    1905 Mount Olympus
    1955 Print · USGS
    Covers Boulder County, including Estes Park, Noland, and other nearby areas
    2 unique versions available
  16. 1906 Map of Blackhawk
    1906 Map of Blackhawk
    1906 Blackhawk
    1906 Print · USGS
    Covers Boulder County, including Arvada, Boulder, and other nearby areas
    5 unique versions available
  19. 1906 Map of Loveland, 1954 Print
    1906 Map of Loveland, 1954 Print
    1906 Loveland
    1954 Print · USGS
    Covers Boulder County, including Fort Collins, Loveland, and other nearby areas
    5 unique versions available
  22. 1907 Map of Mount Olympus
    1907 Map of Mount Olympus
    1907 Mount Olympus
    1907 Print · USGS
    Covers Boulder County, including Estes Park, Noland, and other nearby areas
    4 unique versions available
  25. 1908 Map of Loveland
    1908 Map of Loveland
    1908 Loveland
    1908 Print · USGS
    Covers Boulder County, including Fort Collins, Loveland, and other nearby areas
    7 unique versions available
  28. 1910 Map of Central City, 1957 Print
    1910 Map of Central City, 1957 Print
    1910 Central City
    1957 Print · USGS
    Covers Boulder County, including Idaho Springs, Nederland, and other nearby areas
    2 unique versions available
  31. 1912 Map of Central City
    1912 Map of Central City
    1912 Central City
    1912 Print · USGS
    Covers Boulder County, including Idaho Springs, Nederland, and other nearby areas
    4 unique versions available
  34. 1915 Map of Longs Peak
    1915 Map of Longs Peak
    1915 Longs Peak
    1915 Print · USGS
    Covers Boulder County, including Estes Park, Granby, and other nearby areas
    3 unique versions available
  37. 1919 Map of Rocky Mountain National Park
    1919 Map of Rocky Mountain National Park
    1919 Rocky Mountain National Park
    1919 Print · USGS
    Covers Boulder County, including Estes Park, Granby, and other nearby areas
    8 unique versions available
  40. 1940 Map of Lafayette
    1940 Map of Lafayette
    1940 Lafayette
    1940 Print · USGS
    Covers Boulder County, including Thornton, Westminster, and other nearby areas
  43. 1942 Map of Eldorado Springs
    1942 Map of Eldorado Springs
    1942 Eldorado Springs
    1942 Print · USGS
    Covers Boulder County, including Arvada, Boulder, and other nearby areas
    4 unique versions available
  46. 1942 Map of Louisville
    1942 Map of Louisville
    1942 Louisville
    1942 Print · USGS
    Covers Boulder County, including Westminster, Boulder, and other nearby areas
    3 unique versions available
  49. 1942 Map of Nederland, 1954 Print
    1942 Map of Nederland, 1954 Print
    1942 Nederland
    1954 Print · USGS
    Covers Boulder County, including Nederland, Caribou City, and other nearby areas
    6 unique versions available
  52. 1942 Map of Tungsten, 1955 Print
    1942 Map of Tungsten, 1955 Print
    1942 Tungsten
    1955 Print · USGS
    Covers Boulder County, including Nederland, Coal Creek, and other nearby areas
    5 unique versions available
  55. 1944 Map of Lafayette
    1944 Map of Lafayette
    1944 Lafayette
    1944 Print · USGS
    Covers Boulder County, including Thornton, Westminster, and other nearby areas
  58. 1944 Map of Nederland
    1944 Map of Nederland
    1944 Nederland
    1944 Print · USGS
    Covers Boulder County, including Nederland, Caribou City, and other nearby areas
    2 unique versions available
  61. 1944 Map of Eldorado Springs
    1944 Map of Eldorado Springs
    1944 Eldorado Springs
    1944 Print · USGS
    Covers Boulder County, including Arvada, Boulder, and other nearby areas
    2 unique versions available
  64. 1944 Map of Tungsten
    1944 Map of Tungsten
    1944 Tungsten
    1944 Print · USGS
    Covers Boulder County, including Nederland, Coal Creek, and other nearby areas
  67. 1950 Map of Hygiene, 1952 Print
    1950 Map of Hygiene, 1952 Print
    1950 Hygiene
    1952 Print · USGS
    Covers Boulder County, including Longmont, Lyons, and other nearby areas
    5 unique versions available
  70. 1950 Map of Louisville, 1955 Print
    1950 Map of Louisville, 1955 Print
    1950 Louisville
    1955 Print · USGS
    Covers Boulder County, including Westminster, Boulder, and other nearby areas
  73. 1950 Map of Erie, 1956 Print
    1950 Map of Erie, 1956 Print
    1950 Erie
    1956 Print · USGS
    Covers Boulder County, including Lafayette, Erie, and other nearby areas
Showing maps 1-25 of 72

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Frequently asked questions

  • What are the different types of historical maps available for Boulder County?
  • What is the oldest map of Boulder County?
  • Where can I purchase historical maps of Boulder County for my home or office?
  • Where can I download high-res historical maps of Boulder County?
  • Are there historical topographic maps available for Boulder County?
  • Is there historical aerial imagery available for Boulder County?
  • Where are historical maps of Boulder County sourced from?