Mountainside, New Jersey
Mountainside is a borough in Union County, New Jersey, with an estimated population of 6,924 in 2023. It sits at 40.6807, -74.3603 in the America/New_York time zone.
| Field | Value |
|---|---|
| Place name | Mountainside |
| Type | borough |
| State | New Jersey (NJ) |
| County | Union County |
| Population (2023 est.) | 6,924 |
| Land area | 4.00 sq mi (10.35 km²) |
| Coordinates | 40.6807, -74.3603 |
| Time zone | America/New_York |
| ZIP codes | 07092 |
ZIP codes and area codes for Mountainside
Mountainside covers 1 ZIP code: 07092. Browse all ZIP codes in New Jersey for the full list.
Where is Mountainside?
Mountainside is located in New Jersey, in Union County. The coordinates above can be pasted directly into any map service. The nearest indexed places are listed below, which is a useful check when two states share a place name.
Nearby places
Westfield 4 km · NJSummit 4 km · NJNew Providence 4 km · NJGarwood 5 km · NJFanwood 5 km · NJKenilworth 6 km · NJChatham 7 km · NJWatchung 8 km · NJ
Other places in Union County
Elizabeth 135,829Plainfield 54,670Linden 43,950Westfield 30,559Rahway 29,813Summit 22,344Roselle 22,342Roselle Park 13,932New Providence 13,488Kenilworth 8,259
Related
Frequently asked questions
What county is Mountainside, NJ in?
Mountainside is in Union County, New Jersey.
What is the population of Mountainside, NJ?
The 2023 Census Bureau estimate is 6,924.
What time zone is Mountainside in?
Mountainside is in the America/New_York time zone.