Hillside, NJ Post Offices
Hillside, New Jersey has a population of 21,841. According to the 2021 census, the city's 2 post offices serve 7,257 households with a median income of 7,257. The city is located in Union County and has a land area of 7,165,812 and a water area of 38,905.
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Post Office
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Address
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Phone
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Hours
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| Hillside, NJ Post Office | 397 Hillside Ave, Hillside, New Jersey, NJ, 07205-9992 |
973-926-2645
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Today Closed
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| Hillside, NJ Post Office | 1146 Liberty Ave, Hillside, New Jersey, NJ, 07205-9991 |
908-527-0648
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Today Closed
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