1930s Maps of Ontario, California
Explore 2 historic maps of Ontario from the 1930s. These maps offer a rare glimpse into what life looked like during the 1930s — 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's landscape evolved across the 1930s, 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 1930s, 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's history through authentic maps from the 1930s. This is your window into the past.
Ontario, CA maps
(2)- 1933 Map of Prado
1933 Prado1933 Print · USGSIn the early 1930s, the Chino Valley was a hub of irrigation canals and rail-side settlements before later development changed the landscape. Genealogists and historians can trace old homesteads like Pellissier Ranch and schools like the California Junior Republic School. - 1933 Map of Ontario
1933 Ontario1933 Print · USGSThe citrus heart of the Inland Empire comes into focus in the early thirties as it transitions into a major transit hub. Genealogists and historians can trace the early footprints of Ontario, Upland, and Chino, while locating landmarks like Bellevue Cem and the Pacific Electric line.
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Frequently asked questions
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