1940s Maps of Ontario Ranch, Ontario
Explore 9 historic maps of Ontario Ranch from the 1940s. These maps offer a rare glimpse into what life looked like during the 1940s — 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 Ontario Ranch's landscape evolved across the 1940s, 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 1940s, 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 Ontario Ranch's history through authentic maps from the 1940s. This is your window into the past.
Ontario Ranch, Ontario maps
(9)- 1941 Map of Prado
1941 Prado1941 Print · USGSSouthern California's inland corridor is captured here in the 1930s, showing the river valley before the dam changed the landscape forever. Trace the old routes of the Union Pacific through Prado and locate local landmarks like the Pellissier Ranch.2 unique versions available - 1942 Map of Corona and Vicinity
1942 Corona and Vicinity1942 Print · USGSThe Riverside County citrus belt thrives in the early 1940s, showing a landscape defined by orchards and early suburban expansion. Researchers can trace the development of Norco around the Norconian Club or locate regional landmarks like La Sierra College. - 1942 Map of Ontario and Vicinity
1942 Ontario and Vicinity1942 Print · USGSThe Inland Empire is shown at a pivotal moment in the early 1940s, when orange groves and vineyards still dominated the landscape between the mountains and the valley floor. Researchers can trace the rail corridors of the SOUTHERN PACIFIC and the Pacific Electric while locating old neighborhood markers like Narod, Sunsweet, and the Sierra Vista Sch.2 unique versions available - 1942 Map of Corona, 1947 Print
1942 Corona1947 Print · USGSRiverside County at the dawn of the 1940s reveals a unique mix of agricultural roots, mountain canyons, and significant regional infrastructure projects. Genealogists and local historians can trace the early street plans of Corona and Norco, or locate landmarks like the East Vale Sch and the Santiago Reservoir.2 unique versions available - 1943 Map of Corona
1943 Corona1943 Print · USGSThe Santa Ana River valley during the mid-forties shows a landscape shaped by water management and early inland growth. Trace the development of Corona and Norco alongside the massive Prado Dam and local landmarks like the East Vale Sch. - 1944 Map of Cucamonga
1944 Cucamonga1944 Print · USGSThe San Gabriel Valley and Inland Empire are shown here during the mid-forties, capturing the peak of the region's citrus era and rail-based transit. Researchers can trace early campus layouts at Pomona College or locate vanished landmarks like the Monta Vista Resort and Padua Hills Theater. - 1947 Map of Santa Ana, 1949 Print
1947 Santa Ana1949 Print · USGSSouthern 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. - 1949 Map of Santa Ana
1949 Santa Ana1949 Print · USGSSouthern 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. - 1949 Map of Prado Dam, 1958 Print
1949 Prado Dam1958 Print · USGSSan Bernardino and Riverside counties meet at the site of the newly completed dam and flood basin in the late 1940s. Trace the footprints of the Cal-Aero Flight Academy, the California Institution for Men, and the Rancho Santa Ana Botanic Gardens.2 unique versions available
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Showing maps 1-9 of 9
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