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1900s (20th Century) Maps of Mercer County, New Jersey

Explore 59 historic maps of Mercer 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 Mercer 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 Mercer County's history through authentic maps from the 1900s. This is your window into the past.

Mercer County, NJ maps

(59)
  1. 1900 Map of Cassville
    1900 Map of Cassville
    1900 Cassville
    1900 Print · USGS
    Monmouth and Ocean Counties appear at the turn of the century, showing a landscape defined by water-powered milling and early rail transport. Genealogists can trace family names at Lahaway Plantations, Carrs Tavern, and through the many mills including Colliers Mill.
    3 unique versions available
  4. 1901 Map of New Brunswick
    1901 Map of New Brunswick
    1901 New Brunswick
    1901 Print · USGS
    Middlesex and Monmouth counties are depicted here at the height of the railroad era, as industrial centers like New Brunswick grew alongside rural farmlands. Genealogists and historians can trace family-named landmarks and old hamlets from Old Church and Matchaponix to the site of the Monmouth Battle Ground.
    5 unique versions available
  7. 1902 Map of Navesink
    1902 Map of Navesink
    1902 Navesink
    1902 Print · USGS
    Coastal New Jersey and the Raritan valley are shown here at the turn of the century, when industrial hubs and maritime defenses defined the shoreline. Genealogists can trace family roots through settlements like Old Bridge and Milltown, or locate local landmarks like the State Reform School.
    3 unique versions available
  10. 1904 Map of Burlington, 1958 Print
    1904 Map of Burlington, 1958 Print
    1904 Burlington
    1958 Print · USGS
    The Delaware River corridor thrives during the early twentieth century as a hub of rail, canal, and river commerce. Genealogists and local historians can trace family roots through riverside landings like Borton Landing or follow the legacy of institutions such as the George School and the State Lunatic Asylum.
  13. 1906 Map of Lambertville
    1906 Map of Lambertville
    1906 Lambertville
    1906 Print · USGS
    The Delaware River valley in the early 1900s is shown in transition, where water-borne trade meets the expanding rail network. Genealogists and historians can trace family-named corners like Vanlieu Corners and Marshalls Corner alongside the Delaware and Raritan Canal.
    6 unique versions available
  16. 1906 Map of Burlington
    1906 Map of Burlington
    1906 Burlington
    1906 Print · USGS
    The Delaware River corridor was a bustling hub of rail and water transport in the early 1900s. Genealogists and local historians can trace the development of riverside wharves like Andalusia Wharf and institutional landmarks such as the State Lunatic Asylum.
    6 unique versions available
  19. 1906 Map of Bordentown
    1906 Map of Bordentown
    1906 Bordentown
    1906 Print · USGS
    The Delaware River corridor and Burlington County interior are seen here in the early 1900s, showing a landscape shaped by rail and river commerce. Genealogists can trace early homesteads and hamlets near Bordentown, Hamilton Square, and the mills at Walnford.
    6 unique versions available
  22. 1906 Map of Princeton
    1906 Map of Princeton
    1906 Princeton
    1906 Print · USGS
    New Jersey’s educational and transportation corridors are captured here in the early twentieth century, showing a landscape defined by canals and competing rail lines. Genealogists can trace family roots through settlements like Princeton, Rocky Hill, and Plainsboro.
    4 unique versions available
  25. 1907 Map of Trenton
    1907 Map of Trenton
    1907 Trenton
    1907 Print · USGS
    The Delaware River valley hums with turn-of-the-century industry and transport as river canals and railroads converge between New Jersey and Pennsylvania. Genealogists and local historians can trace the footprint of the George School, find early post offices like Holland PO, or locate old mill sites such as Blackwells Mills.
    4 unique versions available
  28. 1918 Map of Camp Dix
    1918 Map of Camp Dix
    1918 Camp Dix
    1918 Print · USGS
    New Jersey at the height of the Great War features the sprawling mobilization grounds of Camp Dix and its expansive Rifle Range. Genealogists and historians can trace defunct stops like Imlaystown Sta or locate family roots near New Egypt and Colliers Mill.
    2 unique versions available
  31. 1919 Map of New Brunswick, 1921 Print
    1919 Map of New Brunswick, 1921 Print
    1919 New Brunswick
    1921 Print · USGS
    Middlesex and Monmouth counties are depicted here in the years following the Great War, when rail lines and river commerce still drove the region’s growth. Researchers can trace the sprawling Pennsylvania Railroad network through industrial hubs like Jamesburg or visit the hallowed Monmouth Battle Ground.
  34. 1942 Map of Hightstown
    1942 Map of Hightstown
    1942 Hightstown
    1942 Print · USGS
    Central New Jersey during the early years of the war displays a unique blend of scholarly institutions and agricultural hamlets. Researchers can trace the development of Hightstown and Plainsboro, or locate sites like Grovers Mills and the Peddie Prep Sch.
  37. 1942 Map of Burlington
    1942 Map of Burlington
    1942 Burlington
    1942 Print · USGS
    The Delaware River valley thrived at the start of the 1940s as a hub of heavy rail and river commerce. Genealogists and local historians can trace family-named sites and old transit points like Dunks Ferry, Borton Landing, and Neshaminy Falls.
  40. 1942 Map of Jamesburg
    1942 Map of Jamesburg
    1942 Jamesburg
    1942 Print · USGS
    Central New Jersey during the early 1940s reveals a network of rail-dependent boroughs and rural townships. Genealogists and historians can trace family locations near Old Church, identify the grounds of the Jamesburg State Reformatory, and locate vanished points like Bergen Mills.
  43. 1943 Map of Pennington
    1943 Map of Pennington
    1943 Pennington
    1943 Print · USGS
    The Delaware River borderlands between New Jersey and Pennsylvania are captured here during the Second World War. Genealogists and historians can trace riverside landmarks like Scudders Falls, old family hamlets like Bear Tavern, and the early footprint of Mercer Airport.
  46. 1943 Map of Rocky Hill
    1943 Map of Rocky Hill
    1943 Rocky Hill
    1943 Print · USGS
    Somerset County is captured here in the early 1940s, balancing its deep-rooted farming heritage with significant wartime and state institutions. Genealogists and historians can trace family-named sites across the Sourland Mountain Hills and locate the sprawling State Village for Epileptics or the War Aid Depot.
  49. 1943 Map of Lambertville
    1943 Map of Lambertville
    1943 Lambertville
    1943 Print · USGS
    The Delaware River valley at the height of the war years shows a landscape of busy canals, paper mills, and cross-river communities. Researchers can trace the industrial riverfront in Lambertville or locate family sites like the Thompson Memorial Cemetery and Fairfield School.
  52. 1944 Map of Jersey Homesteads
    1944 Map of Jersey Homesteads
    1944 Jersey Homesteads
    1944 Print · USGS
    Monmouth and Ocean counties appear here during the mid-forties, capturing a landscape of rural hamlets and small mills. Researchers can trace the New Deal-era Jersey Homesteads and find ancestral sites like Francis Mills, Carrs Tavern, and Perrineville.
  55. 1944 Map of Trenton West, 1950 Print
    1944 Map of Trenton West, 1950 Print
    1944 Trenton West
    1950 Print · USGS
    The Delaware River corridor near Trenton and Morrisville is captured here at the height of its mid-century rail and industrial era. Genealogists and historians can trace old property boundaries and landmarks from Fallsington to the landmark Wm Trent House 1719.
  58. 1944 Map of Newark, 1971 Print
    1944 Map of Newark, 1971 Print
    1944 Newark
    1971 Print · USGS
    The industrial corridor from Philadelphia to New York was in a period of massive transition during the mid-forties. Genealogists and researchers can trace the rail lines of the Lehigh Valley RR, locate military installations like Picatinny Arsenal, and explore the early sprawl near Levittown.
    5 unique versions available
  61. 1946 Map of Princeton, 1952 Print
    1946 Map of Princeton, 1952 Print
    1946 Princeton
    1952 Print · USGS
    Central New Jersey at the start of the post-war era reveals a landscape defined by its prestigious institutions and expanding rail corridors. Genealogists can locate family landmarks like Rosedale Chapel or trace the early grounds of the Lawrenceville School.
  64. 1947 Map of Monmouth Junction
    1947 Map of Monmouth Junction
    1947 Monmouth Junction
    1947 Print · USGS
    Central New Jersey in the late 1940s reveals a landscape of river-side canal towns and bustling rail hubs. Genealogists and local historians can trace the branching lines at Monmouth Junction and locate Washingtons Headquarters near Kingston.
  67. 1947 Map of Trenton West
    1947 Map of Trenton West
    1947 Trenton West
    1947 Print · USGS
    The Delaware River corridor near Trenton and Morrisville was a hive of rail and river activity just after the war. Genealogists and local historians can trace the foundations of Fallsington, locate the Wm Trent House 1719, and follow the Reading Company line through Woodside.
  70. 1947 Map of Trenton East
    1947 Map of Trenton East
    1947 Trenton East
    1947 Print · USGS
    Mercer County and the Delaware River waterfront are captured here just after the war as industrial hubs and suburban neighborhoods began to expand. Genealogists and historians can trace the foundations of Warner Village, locate the Bordentown Cemetery, or find the Pennsylvania Maritime Academy along the riverbank.
  73. 1947 Map of Roosevelt
    1947 Map of Roosevelt
    1947 Roosevelt
    1947 Print · USGS
    Central New Jersey's rural interior is captured here just after the war, showing the unique intersection of Monmouth, Mercer, and Ocean counties. Genealogists and local historians can trace family-named sites like Carrs Tavern, Holmeson, and the extensive Cranberry bogs near Prospertown.
    2 unique versions available
Showing maps 1-25 of 59

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