Union City
From San Francisco
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| Mayor | Mark Green | |
| Area –Land –Water | 19.2 mi² / 49.9 km² 19.2 mi² / 49.9 km² 0 mi² / 0 km² | |
| Population –Total (2000) –Density | 66,869 1,341.2/km² | |
| Time zone –Summer (DST) | PST (UTC-8) PDT (UTC-7) | |
| Latitude Longitude | 37°35'32" North 122°2'45" West | |
| Official website: http://www.ci.union-city.ca.us/
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