Post offices in Union county.
1886
Berkeley Heights
Cranford
Elizabeth (ch)
Linden
Lyons Farms
Murray Hill
Netherwood
New Providence
Plainfield
Rahway
Roselle
Scotch Plains
Springfield
Summit
Tremley
Union
Westfield
Elizabeth, Plainfield, Rahway and Westfield were identified as Money Order offices. Elizabeth, Plainfield and Rahway were further identified as International Money Order offices.
1939
Baltusrol – P13
Berkley Heights – P112
Cranford
Elizabeth (ch)
(Elizabethport)
Fanwood – 529
Garwood
Grasselli – P6
(Hillside)
Kenilworth – P142
Linden
Murray Hill – P130
New Providence – P230
Plainfield – R1629
Rahway – R1093
Roselle
Roselle Park
Scotch Plains – R368 P377
Springfield – P566
Summit
Union – R482
(Union Square)
Vauxhall – P333
Westfield – R511
R – boxes on rural routes emanating therefrom
P – post-office boxes at offices not having city letter-carrier service
S – boxes on star routes emanating therefrom
post office information from Tim Stowell
Union county, New Jersey, USGenWeb 