Photo: Bryan Housel · CC BY-SA 3.0Mountainside reports less crime per resident than 94% of U.S. towns
On crimes reported to the FBI by Mountainside’s police in 2023–2025, it grades A for safety: #33 of 342 graded towns in New Jersey.
Crimes reported to the FBI per 1,000 residents a year, 2023–2025. “Rest of NJ” is every other New Jersey city and town in the FBI’s tables; the U.S. figure is the FBI’s national estimate as published, averaged over the three years. The FBI publishes no national homicide or robbery rate in our data, so those compare with all U.S. cities and towns in its tables.
What stands out about safety in Mountainside
Mountainside reports less crime than every graded town next door
Of the 3 New Jersey towns on Mountainside’s borders, 3 have a Safety Grade: Berkeley Heights Township (A), Westfield (A), Summit (A−). Neighbors ↓
A job center
Mountainside has 5,124 jobs based in town for 7,346 residents (Census LEHD), so some reports involve people who work or shop there rather than residents. How to read it ↓
Reported crime is rising
Crime reported per resident rose from 2023 to 2025 by more than ordinary year-to-year swings, on the grade’s own score. Trend ↓
Written from the FBI data on this page. Figures are crimes reported to police, not convictions.
What’s behind Mountainside’s grade
Property crimes plus four times violent crimes reported to the FBI per resident, 2023–2025, on a national curve. Both violent and property crime are lower than in most U.S. towns; violent crime is the stronger of the two.
Reported crime is rising
Reported crime per resident rose from 2023 to 2025, by more than ordinary year-to-year swings. Per 1,000 residents, 2023–2025, against the rest of New Jersey.
Show as a table
| Year | Mountainside property | Rest of New Jersey property | Mountainside violent | Rest of New Jersey violent |
|---|---|---|---|---|
| 2023 | 2.3 | 14.8 | 0.1 | 2.2 |
| 2024 | 3.4 | 14.0 | 0.1 | 2.2 |
| 2025 | 5.1 | 12.6 | 0.1 | 2.0 |
Crimes per 1,000 residents
Violent crime, by year and by type
Mountainside’s police reported 3 violent crimes to the FBI over 2023–2025, about 0.1 per 1,000 residents a year, against 2.1 in the rest of New Jersey and the FBI’s national estimate of 3.6.
Show as a table
| Year | Mountainside | Rest of New Jersey | U.S. (FBI national estimate) |
|---|---|---|---|
| 2023 | 0.1 | 2.2 | 3.9 |
| 2024 | 0.1 | 2.2 | 3.6 |
| 2025 | 0.1 | 2.0 | 3.3 |
Violent crimes per 1,000 residents
By type 2023–2025, counts
For every 1,000 residents, about 5 property crimes reported
And fewer than 1 violent crime, in 2025. Below are 1,000 dots, one per resident; each colored dot is one reported crime.
Violent crime per 1,000 residents, 2025
Property crime per 1,000 residents, 2025
Crimes reported to police in 2025 per resident; one person can be the victim of more than one, and some reports involve visitors.
38 crimes reported in 2025
1 violent and 37 property, as reported to the FBI by Mountainside’s police.
2025 offenses reported
Offenses reported to police, not convictions. FBI Uniform Crime Reporting. The last row is counted outside the property total.
Five people died in crashes on Mountainside’s roads in 2019–2023
Mountainside had 4 fatal crashes in five years, in which five people died; 1 was a pedestrian.
That is more than is typical for New Jersey towns of 5,000–25,000 people: at their median rate (4.5 deaths per 100,000 residents a year), a town of Mountainside’s size would see about 2 in five years. With numbers this small, a death or two either way changes the picture, so Mountainside’s own rate (14.2) is context, not a ranking.
Deaths are counted where the crash happened, not where the people lived: a highway through town adds through-traffic deaths, and residents’ own risk on roads elsewhere isn’t here. Town rates sit below state and U.S. rates because a third of fatal crashes happen outside any town. Road safety is described here and is not part of the Safety Grade. Source: NHTSA Fatality Analysis Reporting System (FARS), 2019–2023.
Mountainside and its neighbors
How reported crime compares across the town line. Tap a town to see its safety page.
| Town | Grade | Violent | Property |
|---|---|---|---|
| Mountainside | A | 0.1 | 3.6 |
| Berkeley Heights Township | A | 0.4 | 5.1 |
| Westfield | A | 0.1 | 6.5 |
| Summit | A− | 0.7 | 6.6 |
Crimes reported to the FBI per 1,000 residents a year, 2023–2025.
New Jersey towns of a similar size
| Town | Grade | Violent | Property |
|---|---|---|---|
| Mountainside | A | 0.1 | 3.6 |
| Emerson | A+ | 0.0 | 1.3 |
| Washington | A− | 0.4 | 6.1 |
| Green Brook Township | A− | 0.6 | 6.2 |
| Stratford | B+ | 0.7 | 10.4 |
| Keyport | B− | 1.4 | 13.6 |
The five graded New Jersey towns closest to Mountainside’s population (7,346), by grade.
What this data can and can’t tell you
- It’s reported crime. Only incidents reported to and recorded by police appear here. Many crimes are never reported to police.
- One number for all of Mountainside. A town-wide rate doesn’t show where incidents happen, and that can differ a lot from one part of town to another.
- Visitors count too. Incidents involving people who work, shop or visit are counted against Mountainside’s residents, which raises the per-resident rate.
- Whose population. Rates use the FBI’s population for the department (7,280 in 2025); our figure for Mountainside is 7,346 (2025 Census estimate).
- Gaps are real gaps. A missing year means the department didn’t report a full year, not that nothing happened.
How the grade is calculated, for every town: How TownRatings grades safety →
Questions about safety in Mountainside
Is Mountainside, NJ safe?
On crimes reported to the FBI in 2023–2025, Mountainside reports less crime per resident than 94% of U.S. towns, an A Safety Grade and #33 of 342 in New Jersey. Its police reported 0.1 violent crimes per 1,000 residents a year, against 2.1 in the rest of New Jersey and the FBI’s national estimate of 3.6.
What is the crime rate in Mountainside?
0.1 violent and 3.6 property crimes per 1,000 residents a year, 2023–2025, as reported to the FBI. The rest of New Jersey reports 2.1 and 13.8; the FBI’s national estimate is 3.6 and 17.6.
Is crime going up or down in Mountainside?
Reported crime per resident rose from 2023 to 2025, by more than ordinary year-to-year swings.
Is Mountainside safer than Berkeley Heights Township?
Berkeley Heights Township reports more crime per resident than Mountainside: Berkeley Heights Township grades A for safety and Mountainside A. Berkeley Heights Township’s police reported 0.4 violent and 5.1 property crimes per 1,000 residents a year, 2023–2025.
Who polices Mountainside?
Mountainside’s own police department, which reports to the FBI as “Mountainside”. Its figures are the ones on this page.
Heads-up board
Neighbors looking out for each other in Mountainside.
Your answer becomes a post in Town Square.
Please don’t name or describe individuals. In an emergency, call 911.
Crime: FBI Uniform Crime Reporting Program, Crime Data Explorer: offenses known to law enforcement by city, 2025, and state and national rates. Counts are crimes reported to police, not convictions. The Safety Grade is our own summary of that data, not an official rating. Road deaths: NHTSA Fatality Analysis Reporting System (FARS), 2019–2023. This isn’t an official statement of public safety. In an emergency, call 911.