Lost something in Thornton? Report it once, and we'll handle the rest.
Submit one report and we'll notify the Thornton Police Department, connect with local RTD transit lost and found, alert relevant businesses and public spaces, and monitor Thornton's social channels and online marketplaces continuously for matches.
🔍Recently reported lost items in Thornton – updated this July 18, 2026
- 📍 Plane ticket lost near Rotary Park, July 16.
- 📍 Eyeglasses lost near Thornton Crossroads & 104th, July 16.
- 📍 Car key fob lost near Global Supremacy, July 14.
How ReportLost works in Thornton
You describe what you lost
Tell us what happened, where it went missing, and what it looks like. We gather the exact information the Thornton Police Department and other local agencies need.
We route your report to the right place
Your case gets routed to the Thornton Police Department, RTD if it's a transit item, and relevant local lost and found offices. No bouncing between phone lines or websites.
We monitor the web for your item
Our system scans Thornton Facebook groups, Nextdoor posts, online marketplaces, and community channels for months, automatically flagging matches so you don't have to check every day.
Where to report a lost item in Thornton
Official channels and how ReportLost helps you navigate them
Thornton Police Department
File a police report for lost items at the Thornton Police Department headquarters. They maintain records and may receive found items turned in by the public. We provide the police with your exact location and item description so your case is filed completely.
File a report online or call 720-977-5150|Police headquarters: 9551 Civic Center Drive
RTD Lost & Found (Public Transit)
Lost something on an RTD bus in the Thornton area? RTD maintains a lost and found for items left on vehicles. Call their customer care line to report or check for your item. We submit your item details to RTD and follow up on your behalf.
Denver International Airport Lost & Found
If you lost something at DEN while traveling from the Thornton area, the airport's lost and found office is your direct contact. Items are held for a set period before being discarded or donated.
Local Businesses & Public Spaces
Lost at a store, restaurant, gas station, or park in Thornton? Contact the business directly. We help you pinpoint the exact location and provide staff with a clear description of your item.
Lost Pet
If you've lost a dog, cat, or other pet in Thornton, time is critical. Alert the Thornton Police Animal Control immediately, and contact local shelters including the Denver Animal Shelter and Riverdale Animal Shelter. File a priority lost pet report with ReportLost to mobilize social networks and shelter staff across the region.
Thornton Animal Control: 720-977-5150|Denver Animal Shelter: 720-913-1311
⚠️ Spotted incorrect or outdated info on this page? Let us know, we fix it fast.
Ready to file your report?
The sooner you document your loss, the better your chances of recovery. Once your report is filed, our team takes it from there, reaching out to the right Thornton agencies and monitoring local channels around the clock.
Report my lost item →Losing something in Thornton means contacting multiple places: the police department, RTD customer service, the business where it went missing, plus dozens of community Facebook groups and Nextdoor. By the time you've made half the calls, you've lost hours and forget who you've already asked.
ReportLost simplifies this. File one report with us, and we coordinate with Thornton's official channels and monitor every relevant local platform automatically. Once your report is in, you can breathe easy while our system works in the background, checking for matches continuously over the coming months so you don't have to.
Common places where items get lost in Thornton
Knowing where to focus your search helps, but we'll still monitor everywhere
Thornton Town Center & Shopping Districts
Retail stores, restaurants, and parking areas along 120th Avenue and around the commercial core are frequent loss spots. Check with store managers directly, and we'll follow up with local businesses on your behalf.
Parks & Recreation Areas
Thornton's parks and trails, including areas near Thornton Town Center and around Barr Lake, see lost items on benches, in parking lots, and near playgrounds. Contact the Parks and Recreation Department if needed.
RTD Bus Routes
Items left on RTD buses serving Thornton are turned in to the Lost & Found. We'll report your loss directly to RTD customer care and track whether your item surfaces.
Civic Center & Downtown Thornton
The area around City Hall and Civic Center Drive is busy with municipal business. If you lost something near government buildings or nearby offices, we'll direct your report to the right city department.
Schools & Educational Facilities
If your item was lost at a school, university, or college campus in Thornton, contact the institution's lost and found office. We can help you locate the right department to call.
Thornton community channels where found items are posted
We monitor these groups daily so you don't have to
Facebook group for reporting and searching for lost items across the northern Denver suburbs
Active Facebook community dedicated to missing and found pets in the Thornton area
Reddit community where Thornton residents post about lost items and missing pets
Neighborhood social network where locals report found items and lost pets nearby
Online database and community platform for posting and finding lost pets in Thornton
Frequently asked questions about lost items in Thornton
How long does the Thornton Police Department keep lost items?
The Thornton Police Department holds found items for a period determined by their inventory policies. Call 720-977-5150 to ask about the specific holding period and your item's status. We'll coordinate with them on your timeline.
What if my item was lost on an RTD bus?
Call RTD's Lost & Found at 303-299-2880 (Monday through Friday, 8am to 5pm) with details about the route and date. We'll submit your report to RTD and monitor for matches on your behalf.
Can I report a lost item at Denver International Airport?
Yes. DEN's Lost & Found office is located in the Jeppesen Terminal, Level 1 East (near doors 111-113). Hours are Monday–Friday 8am–7:30pm, Saturday–Sunday 9am–7pm. Items held there may eventually be discarded or donated if not claimed.
Where do I report if I lost something at a Thornton store or business?
Contact the business directly where you left the item. They usually keep lost items at the customer service desk for 30–90 days before disposal. We can help you identify the right business and compose a description for staff.
How long will ReportLost monitor the web for my item?
We monitor community channels, marketplaces, and social platforms continuously for 6 to 12 months, depending on the item type. Our system scans daily for posts matching your item's description, location, and timeframe, so you're alerted as soon as a credible match appears.
Is ReportLost.org an official city service or police department?
No. ReportLost is an independent service that helps you file reports with official Thornton agencies and monitors public channels on your behalf. We do not replace the Thornton Police Department or other government agencies; we complement them by ensuring your report reaches the right place and continues to be tracked when you might otherwise move on.
Lost & found in nearby cities
Don't let your lost item fade away
Starting your report now means we can begin monitoring immediately and alerting relevant Thornton services. The longer you wait, the less likely your item is to be recovered. File a report today and let our team handle the follow-up.
Start my report →ReportLost.org is an independent service and is not affiliated with the Thornton Police Department, City of Thornton, RTD, Denver International Airport, or any other government or private entity listed above. We are not a substitute for reporting directly to these agencies; rather, we work alongside them to increase the chances of recovery by coordinating your report and monitoring public channels. All information is provided for educational purposes. Please verify current contact information and policies directly with the relevant agencies.