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History · Altadena

Altadena, since 1887

Altadena (AL-tə-DEE-nə) is an unincorporated area and census-designated place in the San Gabriel Valley and the Verdugos regions of Los Angeles County, California. We’re gathering its old postcards, photos and papers from public archives right now.

Photo: Bruce Perry

139 years of Altadena

Every find lands on the timeline as it comes in. Gaps show where the archives go quiet, and where neighbors can help.

1887established
42,846people today
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Altadena

California · CA
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Altadena is your selected town. The feed includes posts assigned to this town, not a distance radius or ZIP code.

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/19 · 2025-01-01