Old Maps of Placentia, California for Metal Detecting

Plan your next treasure hunt with 40 historic maps of Placentia. Find old homesites, ghost towns, trails, and gathering spots that may be lost to time — perfect for identifying promising metal detecting locations.

  • Locate forgotten sites: Uncover places like long-lost settlements, abandoned rail lines, or gathering spots.
  • Plan better hunts: Use map overlays combined with LiDAR or satellite views to narrow in on historically rich areas.
  • Made for detectorists: Thousands of hobbyists use these maps to discover relics, coins, and hidden history.

Use these historic maps to boost your research and find new opportunities beneath the surface of Placentia.


Placentia, CA maps

(40)
  1. 1896 Map of Anaheim
    1896 Map of Anaheim
    1896 Anaheim
    1896 Print · USGS
    The Orange County basin appears here in the mid-1890s, when iron rails first connected the young citrus towns to the wider world. Genealogists and researchers can trace the early grids of Anaheim, Fullerton, and Orange alongside now-obscure rail stops like Almond and Marlboro.

  2. 1898 Map of Anaheim, 1899 Print
    1898 Map of Anaheim, 1899 Print
    1898 Anaheim
    1899 Print · USGS
    Northern Orange County is captured here at the height of its citrus and rail era. Genealogists and local historians can trace the early footprints of Anaheim, Fullerton, and Orange, alongside smaller vanished stops like McPherson and Almond.

  3. 1901 Map of Southern California Sheet No. 1
    1901 Map of Southern California Sheet No. 1
    1901 Southern California Sheet No. 1
    1901 Print · USGS
    Greater Los Angeles at the dawn of the twentieth century is a landscape of growing citrus towns and a burgeoning rail network. Genealogists and historians can trace the early gridded streets of Hollywood and Pasadena or locate landmarks like Bear Lake and the Cahuilla Indian Reservation.
    6 unique versions available

  4. 1901 Map of Anaheim
    1901 Map of Anaheim
    1901 Anaheim
    1901 Print · USGS
    Orange County's citrus and rail heartland is meticulously detailed at the start of the century, showing the early layouts of Anaheim and Fullerton. Genealogists can trace early homesteads and rail stops like Loara, Miraflores, and Olinda.
    6 unique versions available

  5. 1902 Map of Corona
    1902 Map of Corona
    1902 Corona
    1902 Print · USGS
    The Orange County and Riverside borderlands at the start of the 1900s show an era of rapid rail expansion and water engineering. Researchers can trace the early footprints of Anaheim and Orange or find vanished industry at the Santiago Coal Mine.
    7 unique versions available

  6. 1904 Map of Southern California Sheet No. 1, 1905 Print
    1904 Map of Southern California Sheet No. 1, 1905 Print
    1904 Southern California Sheet No. 1
    1905 Print · USGS
    Southern California at the dawn of the twentieth century shows a landscape of citrus groves and coastal towns connected by rail. Genealogists and historians can trace early settlements like San Juan Capistrano, find remote sites like the Rose Mine, and study the original water systems of the Santa Ana River.
    2 unique versions available

  7. 1928 Map of La Brea
    1928 Map of La Brea
    1928 La Brea
    1928 Print · USGS
    The hills of Eastern Los Angeles County are captured here in the late twenties during a period of expanding ranching and early oil exploration. Genealogists and historians can trace family-named sites like Silver Peak Ranch, local landmarks such as Fairview School, and the path of the Union Pacific Railroad.
    3 unique versions available

  8. 1932 Map of Orange
    1932 Map of Orange
    1932 Orange
    1932 Print · USGS
    Orange County was a landscape of expanding citrus groves and irrigation works in the early thirties. Local researchers can trace the development of established city grids and outlying communities like Atwood, McPherson, and El Modena alongside the Santa Ana River.

  9. 1935 Map of Coyote Hills
    1935 Map of Coyote Hills
    1935 Coyote Hills
    1935 Print · USGS
    The Orange and Los Angeles county line comes alive in the 1930s as citrus ranches and oil infrastructure began to reshape the Coyote Hills. Researchers can trace the early footprints of Brea, the expansive Bastonchury Ranch, and the Union Oil Tank Farm.
    2 unique versions available

  10. 1935 Map of Olinda
    1935 Map of Olinda
    1935 Olinda
    1935 Print · USGS
    Orange County in the mid-1930s shows an evolving landscape of rail lines and irrigation networks. Genealogists and local historians can trace the early footprints of Yorba Linda and Placentia, or locate defunct rail stops like Loftus and Carlton.

  11. 1935 Map of Garden Grove
    1935 Map of Garden Grove
    1935 Garden Grove
    1935 Print · USGS
    Orange County's citrus heartland is captured here in the mid-1930s, showing a grid of groves and rail lines. Trace family history at Colonia Manzanillo, find the Anaheim Cem, or locate the old Fullerton Landing Field.
    3 unique versions available

  12. 1935 Map of Orange
    1935 Map of Orange
    1935 Orange
    1935 Print · USGS
    Orange County's citrus-rich heartland is captured in the mid-1930s, revealing a landscape of burgeoning towns and vital rail lines. Genealogists can trace early homesteads near St Johns Cem, the Villa Park Sch, and the El Modena Sta.
    2 unique versions available

  13. 1942 Map of Anaheim
    1942 Map of Anaheim
    1942 Anaheim
    1942 Print · USGS
    Orange County's agricultural heart is captured mid-century during a period of rapid wartime development. Genealogists can locate family landmarks like Diamond Bar Ranch, local schools such as Alamitos Sch, and communities like Garden Grove or Stanton.
    2 unique versions available

  14. 1947 Map of Santa Ana, 1949 Print
    1947 Map of Santa Ana, 1949 Print
    1947 Santa Ana
    1949 Print · USGS
    Southern California is depicted here in the late forties, showing the expansion of the Inland Empire and the Orange County coast. Researchers can trace the early layout of Palm Springs or locate long-standing tribal lands like the Pala Indian Reservation and Rincon Indian Res.

  15. 1949 Map of Santa Ana
    1949 Map of Santa Ana
    1949 Santa Ana
    1949 Print · USGS
    Southern California underwent a profound transformation in the late 1940s as military installations and citrus groves shared the landscape. Researchers can trace early coastal growth at Laguna Beach, military history at Camp Pendleton, and the rail corridors of the Pacific Electric.

  16. 1949 Map of Anaheim, 1956 Print
    1949 Map of Anaheim, 1956 Print
    1949 Anaheim
    1956 Print · USGS
    Mid-century Orange County is caught in transition from vast groves to suburban centers just before the arrival of major theme parks. Researchers can trace the legacy of local agriculture and early aviation at Haster Field, Colonia Independencia, and the POW Camp (Aband).

  17. 1949 Map of Orange, 1956 Print
    1949 Map of Orange, 1956 Print
    1949 Orange
    1956 Print · USGS
    The Orange and Santa Ana valley floor shows its transition from citrus groves to post-war suburbs during the late 1940s. Researchers can trace historic family burial sites at Fairhaven Cem or follow the old Southern Pacific line past Villa Park and El Modena.

  18. 1949 Map of Yorba Linda, 1957 Print
    1949 Map of Yorba Linda, 1957 Print
    1949 Yorba Linda
    1957 Print · USGS
    Orange and Los Angeles counties meet in this postwar survey during a time of industrial oil production and expanding citrus groves. Researchers can trace early infrastructure like the Pacific Electric railroad and landmarks such as La Vida Mineral Springs or the Olinda Oil Field.
    2 unique versions available

  19. 1950 Map of Yorba Linda
    1950 Map of Yorba Linda
    1950 Yorba Linda
    1950 Print · USGS
    Mid-century Orange County is caught in a moment of transition between its petroleum roots and growing citrus communities. Genealogists and local historians can trace the early grids of Yorba Linda and Placentia or locate sites like La Vida Mineral Springs and the Olinda Oil Field.

  20. 1950 Map of Orange
    1950 Map of Orange
    1950 Orange
    1950 Print · USGS
    Orange County enters a period of significant growth at mid-century, where citrus groves meet the expansion of Santa Ana and Orange. Researchers can trace old school sites like Lincoln Sch, numerous Oil Wells, and the Yorba Ch (Aban'd) near the river.

  21. 1950 Map of Anaheim
    1950 Map of Anaheim
    1950 Anaheim
    1950 Print · USGS
    Post-war Orange County flourishes here, showing the growth of central citrus hubs before the freeway era. Genealogists can trace family names at Anaheim Cemetery or find historic labor enclaves like Colonia Independencia and Colonia Manzanillo.

  22. 1950 Map of La Habra, 1955 Print
    1950 Map of La Habra, 1955 Print
    1950 La Habra
    1955 Print · USGS
    Northern Orange County was a land of sprawling citrus ranches and active oil fields at the midpoint of the century. You can trace the transition from rural estates like Sunny Hills Ranch to the early suburban streets of La Habra and Buena Park.

  23. 1952 Map of La Habra
    1952 Map of La Habra
    1952 La Habra
    1952 Print · USGS
    The northern Orange County borderlands and Puente Hills are captured here during a pivotal era of suburban and industrial expansion. Trace the footprints of historic agricultural estates like Leffingwell Ranch or find the early oil derricks and tanks near Brea and La Habra Heights.
    2 unique versions available

  24. 1956 Map of Santa Ana
    1956 Map of Santa Ana
    1956 Santa Ana
    1956 Print · USGS
    Southern California underwent massive mid-century transformation as suburban growth met major military and water projects. Trace the postwar expansion of Santa Ana and Riverside, the layout of Camp Pendleton, and the path of the Colorado River Aqueduct.

  25. 1959 Map of Santa Ana, 1971 Print
    1959 Map of Santa Ana, 1971 Print
    1959 Santa Ana
    1971 Print · USGS
    Southern California is captured in a decade of transformation, from the Orange County coast to the desert floor. Researchers can trace the mid-century footprints of Camp Pendleton, March Air Force Base, and the original Ortega Highway.
    3 unique versions available

Showing maps 1-25 of 40

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