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1900s (20th Century) Maps of Jefferson County, New York

Explore 120 historic maps of Jefferson 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 Jefferson 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 Jefferson County's history through authentic maps from the 1900s. This is your window into the past.

Jefferson County, NY maps

(120)
  1. 1900 Map of Clayton, 1957 Print
    1900 Map of Clayton, 1957 Print
    1900 Clayton
    1957 Print · USGS
    The Thousand Islands region and the St. Lawrence riverfront are captured here at the turn of the century, showing a landscape defined by steam and rail. Genealogists can trace family roots in CLAYTON, Chaumont, and Depauville, or follow the path of the Electric R.R. near Dexter.
  4. 1902 Map of Carthage
    1902 Map of Carthage
    1902 Carthage
    1902 Print · USGS
    Upper New York at the turn of the century shows a landscape of river-powered industry and sprawling hill farms. Genealogists can trace family names and old crossroads from Champion Huddle to Gardners Corners, while rail historians can follow the R. W. and O. Div. through the Black River valley.
  7. 1903 Map of Grindstone
    1903 Map of Grindstone
    1903 Grindstone
    1903 Print · USGS
    The Thousand Islands at the turn of the century are captured here along the international border as steamboat traffic flourished. Genealogists and historians can trace old resort landings like Thousand Island Park and Fineview or locate several distinct river beacons including Rock I. L.H. and Lindoe L.H..
    4 unique versions available
  10. 1903 Map of Clayton
    1903 Map of Clayton
    1903 Clayton
    1903 Print · USGS
    Jefferson County's Thousand Islands region and Lake Ontario shoreline are documented here just after the turn of the century. Genealogists and historians can trace the rail lines connecting Clayton and Chaumont, or locate old post offices in Depauville and Rosiere.
    6 unique versions available
  13. 1903 Map of Alexandria Bay
    1903 Map of Alexandria Bay
    1903 Alexandria Bay
    1903 Print · USGS
    The Thousand Islands region appears here at the turn of the century as a burgeoning summer retreat along the international border. Genealogists and local historians can trace the early layouts of Alexandria Bay, the rail corridor through Redwood, and numerous island landings like Collins Landing.
    6 unique versions available
  16. 1903 Map of Theresa
    1903 Map of Theresa
    1903 Theresa
    1903 Print · USGS
    Jefferson County at the turn of the century was a bustling network of dairy farms and rail junctions. You can trace the path of the Rome Watertown and Ogdensburg Div. through Evans Mills or locate early settlements like Stone Mills and Leraysville.
    8 unique versions available
  19. 1903 Map of Orwell, 1955 Print
    1903 Map of Orwell, 1955 Print
    1903 Orwell
    1955 Print · USGS
    Oswego and Jefferson counties are documented here at the opening of the twentieth century, showing a landscape defined by the Tug Hill drainages. Genealogists and historians can trace the early footprints of Littlejohn Settlement, Otto Mills, and the falls at Stillwater.
  22. 1904 Map of Carthage
    1904 Map of Carthage
    1904 Carthage
    1904 Print · USGS
    Jefferson and Lewis Counties at the turn of the century show a landscape defined by the Black River valley and its busy rail lines. Genealogists can trace early homesteads in rural outposts like Champion Huddle, Windecker, and Gardners Corners.
    6 unique versions available
  25. 1905 Map of Orwell
    1905 Map of Orwell
    1905 Orwell
    1905 Print · USGS
    Upper Oswego and Jefferson counties are shown here in the early nineteen-hundreds as a landscape of remote settlements and river-powered valleys. Genealogists and historians can trace the exact locations of Little John Settlement, the Salmon Falls cataracts, and Bennett Bridge.
    6 unique versions available
  28. 1908 Map of Watertown, 1955 Print
    1908 Map of Watertown, 1955 Print
    1908 Watertown
    1955 Print · USGS
    Watertown and the rural uplands of the Tug Hill region are captured here in the early twentieth century as the railroad era peaked. Genealogists can trace early post offices like Klondike and Whitesville, or locate family sites near Brookside Cemetery.
  31. 1909 Map of Watertown
    1909 Map of Watertown
    1909 Watertown
    1909 Print · USGS
    Jefferson County was at its industrial and agrarian height in the early twentieth century, centered on the vital rail hub of Watertown. Local historians can trace family roots through the Middle Road Church or locate vanished post offices like Klondike Worth and Tylerville South Rutland.
    6 unique versions available
  34. 1911 Map of Antwerp
    1911 Map of Antwerp
    1911 Antwerp
    1911 Print · USGS
    Jefferson County was a landscape of bustling river towns and intersecting rail lines just after the turn of the century. Trace the early footprints of Antwerp and Sterlingville, or locate family landmarks like Bishops Corners and Woods Mill.
    6 unique versions available
  37. 1912 Map of Hammond
    1912 Map of Hammond
    1912 Hammond
    1912 Print · USGS
    The rural borderlands of St. Lawrence and Jefferson counties are captured here in the early twentieth century. Genealogists and historians can trace defunct district schools like California School and Stark School, or locate the Old Iron Works and rail stops at South Hammond Oakvale Sta.
    4 unique versions available
  40. 1913 Map of Lake Bonaparte, 1956 Print
    1913 Map of Lake Bonaparte, 1956 Print
    1913 Lake Bonaparte
    1956 Print · USGS
    The Lewis and Jefferson County borderlands come to life in this pre-World War I survey of the Lake Bonaparte region. Researchers can trace the old New York Central rail line past historic landmarks like Kimball Mill and the French Settlement School.
  43. 1916 Map of Lake Bonaparte
    1916 Map of Lake Bonaparte
    1916 Lake Bonaparte
    1916 Print · USGS
    Upper New York State at the dawn of the twentieth century shows a landscape defined by isolated settlements and a budding rail network. Researchers can trace the legacy of early families and industry through sites like Kimball Mill, Natural Bridge, and the French Settlement School.
    5 unique versions available
  46. 1942 Map of Stony Point
    1942 Map of Stony Point
    1942 Stony Point
    1942 Print · USGS
    The Jefferson County shoreline of Lake Ontario is captured here during the early years of World War II. Researchers can locate the Stony Point Light House and the extensive Stony Point Rifle Range along the coast of Henderson.
  49. 1942 Map of Cape Vincent North
    1942 Map of Cape Vincent North
    1942 Cape Vincent North
    1942 Print · USGS
    The international border along the Thousand Islands comes into sharp focus during the early 1940s. Genealogists and local historians can trace rural landmarks like Riverside Cem, School No 13, and the grounds of Burnham Pt State Park.
  52. 1942 Map of Henderson Bay
    1942 Map of Henderson Bay
    1942 Henderson Bay
    1942 Print · USGS
    Jefferson County’s shoreline comes alive in the early 1940s, highlighting the military presence at the historic Madison Barracks. Researchers can trace old lakeside schoolhouses and family cemeteries like Stone Cem or explore the waterfront detail near Sackets Harbor.
  55. 1942 Map of Chaumont
    1942 Map of Chaumont
    1942 Chaumont
    1942 Print · USGS
    Lake Ontario's northern shores are captured in the early 1940s, showing the vital rail-and-water connections of Jefferson County. Genealogists and local historians can trace family sites like Harris Cem, local landmarks such as Wells School, and the villages of Three Mile Bay and Chaumont.
  58. 1942 Map of Galloo Island
    1942 Map of Galloo Island
    1942 Galloo Island
    1942 Print · USGS
    Isolated in eastern Lake Ontario during the early 1940s, this island survey reveals a landscape dedicated to maritime safety and navigation. Researchers can trace the layout of the Galloo Island L H, the Coast Guard Sta, and activity at Gill Harbor.
  61. 1942 Map of Sawmill Bay
    1942 Map of Sawmill Bay
    1942 Sawmill Bay
    1942 Print · USGS
    The Thousand Islands region along the New York-Ontario border is captured here during the early 1940s. Researchers can trace the rural landscape of Jefferson County through sites like Sand Bay Cem, the Wolfe Island L H, and local schoolhouses like School No 19.
  64. 1942 Map of Cape Vincent South
    1942 Map of Cape Vincent South
    1942 Cape Vincent South
    1942 Print · USGS
    Coastal Jefferson County comes alive in this wartime survey of the waterfront where the St. Lawrence meets Lake Ontario. Genealogists can trace rural family life through a dozen numbered schoolhouses and explore landforms like Grenadier Island and the Long Carrying Place.
    2 unique versions available
  67. 1942 Map of Point Peninsula
    1942 Map of Point Peninsula
    1942 Point Peninsula
    1942 Print · USGS
    Jefferson County shorelines were a landscape of military readiness and isolated lake outposts during the Second World War. Researchers can trace the boundaries of the U S Military Res, find family landmarks like Cooper, and locate the Stony Point Rifle Range.
  70. 1942 Map of Clayton, 1957 Print
    1942 Map of Clayton, 1957 Print
    1942 Clayton
    1957 Print · USGS
    The Thousand Islands region appears at a mid-century peak in this survey of the riverfront and agricultural interior. Local historians can trace the foundations of the community through its many numbered rural schools and family burial sites like Corbin Cem and Dutch Cem.
  73. 1942 Map of Sandy Creek, 1957 Print
    1942 Map of Sandy Creek, 1957 Print
    1942 Sandy Creek
    1957 Print · USGS
    Jefferson and Oswego Counties are shown during the early 1940s, when the New York Central rail line linked thriving rural hamlets. Family historians can locate several numbered schoolhouses and burial sites like Brewster Cem and Wesleyan Cem.
Showing maps 1-25 of 120

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Frequently asked questions

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