Town guide · Union

Get to know Union

The practical stuff — trash day, town hall, schools — plus the town’s story and where to go. Kept current by neighbors.

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The essentials

The basics

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Collection days
Trash day
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Recycling day
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Schools & library
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Good to know
ZIP code Wikidata
94587
Area code Wikidata
510

About Union

City in California, United States
70,143Population
19.4 sq miArea
69 ftElevation

Union City is a city in Alameda County, California, United States in the San Francisco Bay Area. The population in the 2020 census was 70,143, up from 69,628 in the 2010 census. It is located approximately 19 miles (31 km) south of Oakland, 30 miles (48 km) from San Francisco, and 20 miles (32 km) north of San Jose. It was incorporated in 1959, combining the communities of Alvarado and Decoto. Alvarado is a California Historical Landmark (#503). The city celebrated its 50th anniversary in 2009.

Official town website ↗

From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)

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Union

California · CA
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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01