Reviewed and updated October 4, 2026 by the SearchSystems.net editorial team. Every office link on this page was opened and checked against the office's own website at review time.
Mountainside is a borough in Union County, New Jersey, with about 7,200 residents (2024 Census Bureau estimate). Its public records are split between the borough and the county. The borough keeps police reports, council records and its own licenses and permits; court cases, jail bookings, deeds and vital records are county or state records. This guide names the Mountainside offices SearchSystems verified, links to each one's own website and gives the phone number and address where the office publishes them. SearchSystems verified 2 borough office pages for Mountainside, every one opened and checked.
In this guide: Borough or county, Police records, Borough Hall, Records requests, Other cities and Questions.
Borough or county record: where Mountainside records are kept
- Kept by the Borough of Mountainside: police reports, council and board meeting records, ordinances and the borough's own licenses and permits.
- Kept by Union County or the state: court cases, jail bookings, deeds and property values and birth and death certificates. These are not borough records; they are in the Union County public records guide under court records, jail lookups, property records and vital records.
Mountainside police reports and records
Incident reports, crash reports and the other records of the Mountainside police are requested from the department's records unit, usually in writing or through an online form. Reports on open investigations and the names of victims and juveniles are usually withheld or redacted, and some states limit crash reports to the people involved and their insurers. The page below is the one SearchSystems verified for Mountainside police records.
- Website: mountainside-nj.com/department/police-department (page title: Police Department | Borough of Mountainside)
- Phone: (908) 232-8100
- Address: 1385 U.S. Highway 22 East Mountainside, NJ 07092
- Checked: September 26, 2026, the page answered.
Jail bookings and inmate lookups are usually handled by the county, not the borough police. They are in the Union County public records guide under jail and inmate lookups.
Mountainside Borough Hall: departments, licenses and permits
Business licenses, building permits, code enforcement cases and the borough's other records are kept by the department that issued them. The borough's own website below lists its departments and how to reach them.
- Website: mountainside-nj.com/department (page title: Department | Borough of Mountainside)
- Phone: 908 232 2400
- Address: 1385 US Highway 22 East Mountainside, NJ 07092
- Checked: September 26, 2026, the page answered.
Public records requests to Mountainside
New Jersey public records law applies to the borough government of Mountainside. A record that is not posted online is requested from the office that holds it: the police records unit for police reports and the department that issued a permit or license for its records. A request that names a date, an address, or a report or case number is the easiest to answer.
Other cities and towns in Union County
SearchSystems has a guide like this one for these other cities and towns in Union County. The Union County public records guide covers the records the county keeps for all of them.
Frequently Asked Questions
Is this the official Mountainside website?
No. SearchSystems.net is an independent public records directory, online since 1997. It links to the official Mountainside offices listed above, and the borough's own website is mountainside-nj.com; SearchSystems does not hold records, charge for them or take requests.
How do I get a police report in Mountainside?
Request it from the Mountainside police records unit at mountainside-nj.com, phone (908) 232-8100. Reports on open investigations and the names of victims and juveniles are usually withheld or redacted.
Where do I find court records or jail bookings for Mountainside?
Mountainside cases are heard by the courts that serve Union County, and people arrested in Mountainside are usually booked into the county jail. Both are covered in the Union County public records guide on SearchSystems.
How do I request a public record from Mountainside?
From the office that holds it: the police records unit for police reports and the department that issued a permit or license for its records. New Jersey public records law applies to borough governments.