Join Free

1900s (20th Century) Maps of Ada County, Idaho

Explore 80 historic maps of Ada 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 Ada 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 Ada County's history through authentic maps from the 1900s. This is your window into the past.

Ada County, ID maps

(80)
  1. 1947 Map of Jackass Butte, 1971 Print
    1947 Map of Jackass Butte, 1971 Print
    1947 Jackass Butte
    1971 Print · USGS
    The Snake River canyon and the high desert bluffs of Owyhee County come alive in this late 1940s survey. Researchers can trace the path of the historic Emigrant Trail and locate local landmarks like Brooks Ranch, Birch Creek Sch, and Rabbit Springs.
    2 unique versions available
  4. 1947 Map of Wild Horse Butte, 1973 Print
    1947 Map of Wild Horse Butte, 1973 Print
    1947 Wild Horse Butte
    1973 Print · USGS
    The Snake River canyon near the Ada and Owyhee county line comes into focus in the late 1940s. Researchers can trace early river crossings at Swan Falls and the Ferry, or locate natural landmarks like Wild Horse Butte and Thomas Flats.
  7. 1947 Map of Dorsey Butte, 1979 Print
    1947 Map of Dorsey Butte, 1979 Print
    1947 Dorsey Butte
    1979 Print · USGS
    Elmore County's high desert landscape is captured here in the late 1940s as irrigation projects transformed the arid basin. Researchers can trace the local water economy through the High Line Canal and locate the historic Hayland Sch near Chattin Hill.
  10. 1948 Map of Castle Butte
    1948 Map of Castle Butte
    1948 Castle Butte
    1948 Print · USGS
    Owyhee County ranching and transit corridors are captured here in the late 1940s as the high plateau supported isolated homesteads and water projects. Researchers can trace the historic Emigrant Trail and locate local landmarks such as the Castle Creek Sch, Morgan Place, and the site of Clarks Ferry.
    2 unique versions available
  13. 1948 Map of Big Foot Butte
    1948 Map of Big Foot Butte
    1948 Big Foot Butte
    1948 Print · USGS
    Ada County's high desert landscape was still a vast open range in the late 1940s, defined by volcanic landmarks and scarce water. Trace the primitive road network and survey benchmarks past Big Foot Butte to Tadpole Lake and Rabbit Creek.
    4 unique versions available
  16. 1948 Map of Wild Horse Butte
    1948 Map of Wild Horse Butte
    1948 Wild Horse Butte
    1948 Print · USGS
    The high desert canyon of the Snake River forms the divide between Ada and Owyhee counties in the late 1940s. Researchers can trace the river's path past Wild Horse Butte and Swan Falls to locate old water sources like Fossil Cr.
  19. 1948 Map of Jackass Butte
    1948 Map of Jackass Butte
    1948 Jackass Butte
    1948 Print · USGS
    The Snake River canyon in Owyhee County was a critical corridor for both pioneers and post-war irrigators during the late 1940s. Researchers can trace the path of the Emigrant Trail or locate local landmarks like Brooks Ranch and Birch Creek Sch.
  22. 1948 Map of Dorsey Butte
    1948 Map of Dorsey Butte
    1948 Dorsey Butte
    1948 Print · USGS
    Elmore County during the late 1940s reveals a quiet landscape of high desert flats and river borders just as postwar ranching was modernizing. Researchers can locate the Hayland Sch, a private Landing Strip, and the rugged landmarks of Dorsey Butte and Chattin Hill.
  25. 1948 Map of Big Foot Butte, 1952 Print
    1948 Map of Big Foot Butte, 1952 Print
    1948 Big Foot Butte
    1952 Print · USGS
    In the late 1940s, the Snake River canyon served as the heart of a transforming Idaho ranching and irrigation landscape. Researchers can trace the path of the Emigrant Trail or locate vanished landmarks like Birch Creek School and the Brooks Ranch.
  28. 1948 Map of Sinker Butte, 1966 Print
    1948 Map of Sinker Butte, 1966 Print
    1948 Sinker Butte
    1966 Print · USGS
    Owyhee County's high desert reveals its frontier history in the late 1940s, marked by the intersection of early pioneer routes and the deep canyon of the Snake River. Historians can trace the Emigrant Trail past the Otter Massacre Site and locate remote outposts like Montini Ranch.
    2 unique versions available
  31. 1948 Map of Little Joe Butte, 1976 Print
    1948 Map of Little Joe Butte, 1976 Print
    1948 Little Joe Butte
    1976 Print · USGS
    Ada County’s high desert landscape comes into focus during the late 1940s, a time when the region remained largely open rangeland. Researchers can trace early drainage patterns and land markers near Wind Butte, Little Joe Butte, and Corder Creek.
  34. 1949 Map of Sinker Butte
    1949 Map of Sinker Butte
    1949 Sinker Butte
    1949 Print · USGS
    The Owyhee desert meets the canyon of the Snake River in the late 1940s, revealing a landscape defined by pioneer trails and ranching. Trace the path of the Emigrant Trail past the Otter Massacre Site and the remote Gabica Ranch.
  37. 1949 Map of Little Joe Butte
    1949 Map of Little Joe Butte
    1949 Little Joe Butte
    1949 Print · USGS
    The high desert of southwestern Idaho is captured here in the late 1940s, showing a landscape shaped by seasonal water and volcanic features. Genealogists and researchers can trace the drainage of Corder Creek and Rabbit Cr near landmarks like Wind Butte and Little Joe Butte.
  40. 1949 Map of Oreana, 1952 Print
    1949 Map of Oreana, 1952 Print
    1949 Oreana
    1952 Print · USGS
    Owyhee County ranching and the deep Snake River canyon are captured here in the post-war era. Researchers can trace the path of the Emigrant Road and locate historical landmarks like the Otter Massacre Site, Oreana, and local family ranch sites.
    2 unique versions available
  43. 1949 Map of Robie Creek, 1986 Print
    1949 Map of Robie Creek, 1986 Print
    1949 Robie Creek
    1986 Print · USGS
    The high country northeast of Boise is captured here in the early seventies, showing a landscape of mineral prospects and forest summits. Trace old mining activity at Bumblebee Mine or locate historical routes near Davidson Ranch and Aldape Summit.
  46. 1953 Map of Eagle, 1955 Print
    1953 Map of Eagle, 1955 Print
    1953 Eagle
    1955 Print · USGS
    The Boise River valley in the early fifties shows a landscape of irrigation canals and early aviation. Genealogists can locate McMillan Chapel, Dry Creek Cem, and several schoolhouses like Green Meadows Sch.
    5 unique versions available
  49. 1953 Map of Cloverdale, 1955 Print
    1953 Map of Cloverdale, 1955 Print
    1953 Cloverdale
    1955 Print · USGS
    Ada County in the early fifties is shown here as a productive landscape of family farms and irrigation canals. Genealogists can trace rural life through numerous district schools like Hillsdale Sch and landmarks like the Tenmile Rodeo Grounds or Cloverdale Memorial Park.
    4 unique versions available
  52. 1953 Map of Meridian, 1955 Print
    1953 Map of Meridian, 1955 Print
    1953 Meridian
    1955 Print · USGS
    The town of Meridian serves as a hub for the Boise Valley's irrigation network in the early fifties. Local historians can trace the development of rural education and industry through landmarks like Columbia School, Amity Sch, and the Union Pacific Railroad.
    4 unique versions available
  55. 1953 Map of Star, 1955 Print
    1953 Map of Star, 1955 Print
    1953 Star
    1955 Print · USGS
    Near the border of Ada and Canyon Counties in the early fifties, this map captures the intense irrigation culture of the Boise Valley. Genealogists can locate several rural schools and burial grounds including the Home of the Peace Cem and Lower Fairview School.
    3 unique versions available
  58. 1953 Map of Montour, 1956 Print
    1953 Map of Montour, 1956 Print
    1953 Montour
    1956 Print · USGS
    The Payette River valley in the early fifties shows a landscape of reclamation and resource extraction. Researchers can trace the rail corridor of the Union Pacific or locate early mining sites like the Gem State Mine and the Sweet Cemetery.
    3 unique versions available
  61. 1954 Map of Boise South, 1956 Print
    1954 Map of Boise South, 1956 Print
    1954 Boise South
    1956 Print · USGS
    Mid-century Boise shows a rapidly growing capital city and its vital irrigation network just before the height of the suburban boom. Genealogists and historians can trace Pioneer Cemetery, the State Penitentiary, and the original campus of Boise Jr College.
    2 unique versions available
  64. 1954 Map of Boise North, 1957 Print
    1954 Map of Boise North, 1957 Print
    1954 Boise North
    1957 Print · USGS
    Boise and Garden City are captured in the mid-fifties as the city began to climb the foothills and expand along the river. Genealogists and local historians can locate early institutions like the Soldiers Home, Collister Sch, and the Boise City Canal.
    2 unique versions available
  67. 1954 Map of Boise, 1958 Print
    1954 Map of Boise, 1958 Print
    1954 Boise
    1958 Print · USGS
    Boise and the surrounding Idaho foothills are captured here in the mid-fifties, just as suburban expansion began meeting the rugged edge of the Boise National Forest. Researchers can trace the Old Oregon Trail, locate the State Penitentiary, and find long-established schools like St Marys Sch.
    2 unique versions available
  70. 1955 Map of Christmas Mtn, 1956 Print
    1955 Map of Christmas Mtn, 1956 Print
    1955 Christmas Mtn
    1956 Print · USGS
    Ada County in the mid-1950s is captured here as a landscape of training grounds and geological landmarks. You can trace the layout of the Rifle Range, locate the remote Landing Strip, and explore sites like Higby Cave and Christmas Mtn.
    2 unique versions available
  73. 1955 Map of Coyote Butte, 1956 Print
    1955 Map of Coyote Butte, 1956 Print
    1955 Coyote Butte
    1956 Print · USGS
    This mid-century survey captures the open rangeland of Ada County during the mid-1950s, before the expansion of the Treasure Valley. Researchers can trace the foundational Boise Base Line and locate landmarks like Coyote Butte and Christmas Mountain.
    2 unique versions available
Showing maps 1-25 of 80

Top cities of Ada County

See more

Frequently asked questions

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