| Statistic | Reportedincidents | /100k people | Mountainside/100k people | New Jersey/100k people | National/100k people |
| Total crime | 25 | n/a (estimate) | 354 | 1,645 | 2,119 |
| Murder | 0 | n/a | 0.0 | 2.3 | 5.0 |
| Rape | 0 | n/a | 0.0 | 17.3 | 37.5 |
| Robbery | 1 | n/a | 14.2 | 49.3 | 60.6 |
| Assault | 0 | n/a | 0.0 | 148.8 | 256.1 |
| Violent crime | 1 | n/a (estimate) | 14 | 218 | 359 |
| Burglary | 5 | n/a | 70.9 | 145.3 | 229.2 |
| Theft | 16 | n/a | 226.9 | 1,119.4 | 1,272.1 |
| Vehicle theft | 3 | n/a | 42.5 | 162.6 | 258.8 |
| Property crime | 24 | n/a (estimate) | 340 | 1,427 | 1,760 |

The Mountainside crime rates are 83.3% lower than the national average. There are two main categories of crime - violent crime and property crime. Violent crime consists of murder, rape, robbery and assault, while property crimes include burglary, theft and vehicle theft. There were a total of 1 violent crimes in Mountainside (14 per 100,000 people), which is 96.1% lower than the national average and there were a total of 24 property crimes (340 per 100,000 residents) which is 80.7% lower than average.
Mountainside has a crime rate of 354, which is considerably less than the national average of 2119. This results in Mountainside being one of the safest places to live across the United States. The crime rate is based on the total number of violent and property crimes per 100,000 people.
Mountainside stands out with one of the lowest violent crime rates in the United States. Reporting only 14 violent crimes per 100,000 people, Mountainside secures its place among the safest cities in the nation, making it an enticing destination for those in search of a new home.
Mountainside showcased a dedication to violent crime safety in its latest reported crime year by achieving a murder rate of 0. This accomplishment could indicate that it is a safe place for residents, but also provides a shining example to other urban areas endeavoring to create safer communities.
Since 1990, property crime rates per 100,000 people in the United States have steadily decreased. Recently, the average did increase slightly. Having said that, Mountainside has a property crime rate that is well below the national average with only 340 reported property crimes compared to the national average of 1760. Based on this report, Mountainside remains a very safe place to live with regards to property crime.
AreaVibes has conducted polls asking local residents if they feel safe living in Mountainside. Based on the results of the surveys (6 responses), 100% of people felt that there was very little crime in Mountainside and felt safe walking alone at night. While 0% of people felt that it was not a safe place to live and did not feel safe walking alone at night.
To determine if Mountainside is a safe place to live, let's take a look at the overall crime rate of the area, as well as the number of daily crimes. Mountainside has a total crime rate that is 83% lower than the national average per 100,000 residents. This results in a total of 0.07 daily crimes (0 violent daily crimes and 0.07 daily property crimes) in Mountainside.
Mountainside has a poverty rate of 1.6, while the national average is 15.1. In the past, there has been a direct correlation between high or low poverty rates and high or low crime stats. Elevated poverty levels and income disparities can contribute to heightened criminal activity, as individuals may resort to unlawful means to address their fundamental necessities. While lower poverty levels have led to a reduction in typical crime levels compared to other areas.
In areas where employment options are limited or where a significant proportion of jobs offer meager wages, the likelihood of heightened unemployment and homelessness increases. Regions facing challenges related to unemployment or inadequate income may become more vulnerable to a surge in crime stemming from economic instability. While low unemployment rates tend to lead to reduced crime in most areas. Mountainside currently has an unemployment rate of 1.8%, contrasting with the national average of 4.9%. This could be one of many factors that could contribute to a higher or lower crime rate.
High population density areas are often large urban centers with diverse economic opportunities. These areas can exacerbate income inequality, with pockets of poverty existing alongside affluence. Areas with economic disparities may experience higher property crimes and, in some cases, violent crimes. On the other hand, areas with low population density tend to see lower Mountainside crime rates. The population density in Mountainside is 1770.1 people per square mile, while the national average is 90.6 people per square mile.
| Item | Mountainside | New Jersey | National |
| Law enforcement employees (officers & civilians) | 26 | 14,540 | 558,732 |
| Police officers & civilians /1000 residents | 3.8 | 5.7 | 3.3 |
| State | Total offenders | New Jersey /100K | National /100K |
| New Jersey | 4,539 | 54 | 266 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| New Providence, NJ | 13,898 | 44 | 255 | 299 |
| Six Mile Run, NJ | 3,566 | 42 | 272 | 313 |
| Weston, NJ | 2,014 | 43 | 283 | 326 |
| Rockaway, NJ | 6,538 | 15 | 326 | 341 |
| Caldwell, NJ | 8,222 | 67 | 323 | 390 |
| Madison, NJ | 17,048 | 12 | 409 | 421 |
| Mountain Lakes, NJ | 4,398 | 57 | 371 | 427 |
| Mountainside, NJ | 7,074 | 14 | 340 | 354 |
| City | Population | Violent crime/100k people | Property crime/100k people | Total crime/100k people |
| Live Oak, FL | 7,073 | 287 | 1,526 | 1,813 |
| Idabel, OK | 7,077 | 158 | 2,125 | 2,283 |
| Pea Ridge, WV | 7,080 | 126 | 587 | 713 |
| East Foothills, CA | 7,085 | 158 | 676 | 834 |
| Franklin, LA | 7,085 | 547 | 2,416 | 2,963 |
| Mountainside, NJ | 7,074 | 14 | 340 | 354 |