Lost something in Mount Arlington? Here are the offices that take your report.
One report and we connect you with the Mount Arlington Police Department, Borough Hall, and active local lost and found channels. Your report stays active, keeping watch for a match.
What did you lose?
If there isn’t an adequate suggestion, select “Other – My item isn’t listed” and enter the item’s category. You can provide details later.
Publishing your report is free and your details stay private. The assisted search is a separate paid service, described in the Terms.
Recent activity
Across the United States
- Wrislet clutch gray/silver bag with documents · Chicago, IL, October 8
- Ring TM on top · Greensboro, NC, October 8
- Keys · Sarasota, FL, October 8
- Keys · Brookline, MA, October 7
- Camera · Monterey, CA, October 7
Local contact details reviewed on October 7, 2026.
How ReportLost Works in Mount Arlington
You File Your Report
Tell us what you lost, where, and when. We capture all the details that matter, so you don't have to repeat yourself to multiple offices.
We Route It to the Right Places
Your report goes straight to the Mount Arlington Police Department, Borough Hall Animal Control, local transit systems, and NJ TRANSIT if applicable, plus active community channels.
Your Report Keeps Searching
For 12 months, your item description stays active and gets matched against new lost and found posts, marketplace listings, and community reports. You'll get an alert if a credible match surfaces, so you can move on without checking every day.
Where Lost Items Go in Mount Arlington
Know the channels. Let us coordinate them for you.
Mount Arlington Police Department
The Police Department is your first official stop for lost property. They maintain a lost and found at headquarters and can file a report to help locate your item. We tell you which precinct covers your location and generate the exact details to include in your report.
Mount Arlington Borough Hall
Borough Hall handles many lost and found matters, including coordination with Animal Control if you've lost a pet. The Borough Clerk's office can point you to the right desk or official channel. We know exactly which department to contact on your behalf.
NJ TRANSIT Lost and Found
If your wallet, phone, or bag came off a local NJ TRANSIT bus or train, NJ TRANSIT's Lost and Found team can help. They accept reports online, by phone, and in person at customer service offices. We file the report with the exact route and time details.
Newark Airport (EWR)
Traveling through Newark Liberty International Airport? Lost items at EWR are held and can be claimed through their virtual lost and found office. Contact them directly or use their online claim system.
Lost Pet: Animal Control & Local Shelters
Mount Arlington's Animal Control works with nearby shelters and the community to reunite lost dogs and cats with their families. If your pet is missing, contact Animal Control immediately and file a priority lost pet report to activate broader local search networks.
⚠️ Spotted incorrect or outdated information? Let us know so we can review it.
Found Your Item Faster When You Act Early
The sooner you file a report, the sooner ReportLost connects you with local services and begins the active search. Each hour counts, but once your report is live, you can relax knowing we're coordinating the hunt.
Report my lost item →Mount Arlington is a tight-knit community where items slip away in parking lots, along local roads, at the borough's parks, and on NJ TRANSIT buses heading to Morris County and beyond. When something goes missing, the people who might have found it are scattered across the Police Department, Borough Hall, transit systems, and Facebook groups—and each one runs on a different timeline.
ReportLost simplifies that mess. One form reaches all the places at once, and your report doesn't disappear after a few days. It stays live in the background, quietly matching your lost item against found items and community posts for months, so you can breathe easy knowing someone's actively looking even when you're not.
Common Places to Lose Things in Mount Arlington
Items turn up everywhere. Here's where to check first—and where we'll look on your behalf.
Downtown & Howard Boulevard
Shops, Borough Hall, and foot traffic near the town center are hotspots for wallets, keys, and small bags. Start with the closest business, then file a report with Borough Hall.
Alterbrand Avenue & Police Headquarters
The Police Department is central, and the area around it sees regular foot and vehicle traffic. Lost items near police operations often turn up in their lost and found.
Local Parks & Recreation Areas
Mount Arlington's parks are gathering spots where rings, bracelets, and personal items are frequently found. Check with parks and recreation, then file with the Police Department.
NJ TRANSIT Bus Routes
If you lost something on a local bus heading toward Morris County or the greater Newark area, contact NJ TRANSIT immediately. They track lost items by route and date.
Community Lost and Found Networks
Mount Arlington residents share found items and tips in these channels. We post your report to reach them all.
Facebook group for lost and found pets across the state, active with sightings and tips
Local Facebook group where residents post found items and community notices
Reddit community for New Jersey, includes lost and found posts and local advice
Neighborhood app where Mount Arlington residents report found items and organize searches
Frequently Asked Questions
How long does the Mount Arlington Police Department keep lost items?
The Police Department typically holds lost property for a reasonable period before disposal. Call (973) 398-2100 to ask about specific retention timelines for your item. ReportLost keeps your report active during this time and beyond, increasing the chance of a match.
What's the fastest way to report a lost item to Mount Arlington police?
You can call (973) 398-2100 during business hours or visit Police Headquarters at 520 Alterbrand Ave. ReportLost files your report and coordinates with them on your behalf, saving you a trip or phone hold.
How do I check if someone found my item on NJ TRANSIT?
Contact NJ TRANSIT Lost and Found at (973) 275-5555 with your route number, date, and time. If you're uncertain, ReportLost submits the report to their system and can alert you if a match is reported.
If I lost something at Newark Airport, who do I call?
Contact EWR Lost and Found at (212) 435-7000 or file a claim through their virtual office at newarkairport.com/lost-and-found. They hold items for up to 60 days. ReportLost can also coordinate this for you.
What should I do if I lost a pet in Mount Arlington?
Contact Animal Control immediately at (973) 398-6832 Ext. 112. Alert nearby shelters and post on lost pet networks. Then <a href="/report-lost-pet">file a priority lost pet report with ReportLost</a> to activate an extended search across community channels.
Is ReportLost.org official or affiliated with the Mount Arlington Police Department?
ReportLost is an independent service, not part of the Police Department or any government agency. We're a separate platform that coordinates lost item reports to official channels, social media, and community networks on your behalf. We don't replace contacting the police—we make it easier and more thorough by routing your report to all the right places at once and keeping your search active for months.
Lost & found in nearby cities
Where to file your report
File your report now. We'll notify the right people and channels in Mount Arlington, and your search will stay active for the entire period. You've got this.
Start my report →ReportLost.org is an independent service and is not affiliated with, endorsed by, or part of the Mount Arlington Police Department, Borough of Mount Arlington, NJ TRANSIT, Newark Airport, or any other government or private entity listed on this page. We coordinate reports on your behalf to these services and community channels; we do not replace direct contact with official authorities. Always contact local police or the appropriate authority directly for urgent matters or emergencies.