1920s Maps of Diamond Bar, California
Explore 3 historic maps of Diamond Bar from the 1920s. These maps offer a rare glimpse into what life looked like during the 1920s — 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 Diamond Bar's landscape evolved across the 1920s, 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 1920s, 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 Diamond Bar's history through authentic maps from the 1920s. This is your window into the past.
Diamond Bar, CA maps
(3)- 1927 Map of Covina
1927 Covina1927 Print · USGSThe eastern San Gabriel Valley was a thriving agricultural and transit hub in the 1920s, dominated by orchards and sprawling ranch lands. Genealogists can trace family roots through settlements like Covina, the Diamond Bar Ranch, and the Protestant Home for Boys.3 unique versions available - 1928 Map of Claremont
1928 Claremont1928 Print · USGSEastern Los Angeles County appears here in the late twenties, during a period of rapid suburban and academic growth. Researchers can trace the early layouts of Claremont and Pomona, locating Pomona College, the Pacific Electric lines, and the Pomona Cemetery.3 unique versions available - 1928 Map of La Brea
1928 La Brea1928 Print · USGSThe 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
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Frequently asked questions
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