Lost something in El Sobrante? Report it and we'll search for it.
One report reaches the Contra Costa Sheriff, local transit systems, and community networks. Your report stays active, keeping search for a match without you having to check back daily.
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
California : found property must be held by law enforcement for at least 90 days before it can pass to the finder, be auctioned or disposed of. (California Civil Code §2080.2)
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
You tell us what you lost
Describe your item, where you lost it, and when. We gather the details needed to get the word out to the right places.
We route it to the right channels
Your report goes straight to the Contra Costa Sheriff's lost property team, AC Transit or WestCAT if it's a transit loss, local animal services if it's a pet, and relevant community channels across the Bay Area.
Your report keeps searching for you
For your entire search period, your report stays active and continues to match against new found items, social posts, and marketplace listings. You'll get an alert the moment a credible match appears, so you can focus on your day.
Where Items Turn Up in El Sobrante
Know who to contact and how ReportLost helps you reach them.
Contra Costa Sheriff's Office
The Sheriff holds lost property and fields reports for the El Sobrante area. Items are typically kept for a set period before disposal. We tell you which station covers your loss location and generate the right information to include in your report.
Contact Bay Station (serves El Sobrante)|Main Sheriff's Office
AC Transit & WestCAT Lost & Found
Lost something on a bus? Both AC Transit and WestCAT run lost property searches. AC Transit keeps items for 30 days, WestCAT for 30 days as well. We point you to the right form and help you submit the exact details so the transit authority can match your item fast.
Lost Pets
If your dog or cat is missing, Contra Costa Animal Services holds impounded animals for a minimum of 3 business days. Local shelters and rescue networks are your fastest allies. File a priority lost pet report with us and we'll alert the shelter, vets, and community groups in one step.
Local Community & Marketplaces
Craigslist, Facebook groups, Nextdoor, and Reddit threads are where El Sobrante and Richmond residents post found items and lost pet sightings. We automatically check these channels and notify you the moment your item appears, saving you hours of manual searching.
⚠️ Spotted incorrect or outdated information? Let us know so we can review it.
Act now, so your report can work around the clock.
The sooner you report your loss, the sooner we can start matching it across all the right places. Once you've filed, you can breathe easy, your report stays live and keeps searching for you.
Report my lost item →El Sobrante sits in the heart of Contra Costa County, where items slip away in busy neighborhoods, on AC Transit or WestCAT buses, and across the many local gathering spots. When you lose a wallet, phone, ring, or anything else, you're suddenly juggling calls to the Sheriff's office, the transit authority, animal services, and hoping the right community sees your post. That's the broken system right now, and it wastes your time.
ReportLost simplifies everything. File one report with us, and we notify the Contra Costa Sheriff's lost property unit, the transit systems that serve the area, local animal shelters if needed, and the Facebook groups and community channels where locals post found items every day. Better still, your report doesn't disappear after a week or a month, it stays active and automatically checks for matches across all those channels for 12 months, so you're not the one refreshing feeds and making calls over and over.
Common Loss Hotspots in El Sobrante
Items slip away everywhere, but these neighborhoods see the most traffic.
Main Shopping & Transit Corridors
Along the major routes and bus stops where AC Transit and WestCAT pass through, wallets and phones are often left behind on vehicles or at stops.
Residential Neighborhoods
The quiet streets of El Sobrante, from Appian Way to the surrounding blocks, where items are lost during daily errands and neighborhood walks.
Parks & Open Spaces
Local parks and green areas where rings, phones, and pet collars are found by residents out for walks or gatherings.
Community Centers & Library
The El Sobrante Library and nearby community spaces are frequent turn-in points for found items.
Community Channels
Where El Sobrante residents post found items and lost pet sightings.
Community and neighborhood groups where locals post found items and lost pet sightings
The hyperlocal network for your street and immediate area
The Richmond subreddit, where nearby residents also post about El Sobrante losses
The lost & found section for the El Sobrante area
Pet-specific alert network for lost and found animals
Frequently Asked Questions
How long does the Sheriff's office hold lost items?
The Contra Costa Sheriff typically holds lost property for a set retention period before it goes to disposal or auction. Check with Bay Station at (510) 262-4203 for specifics. Once you file a ReportLost report, we alert them with your details so they can flag your item if it comes in.
What if I lost my item on the bus?
AC Transit and WestCAT both keep lost items for 30 days. You can search their lost & found inventory online or call AC Transit customer service at (510) 891-4777. We'll submit your claim on both systems and check for matches as new items arrive.
How do I know if my pet has been brought to the shelter?
Call Contra Costa Animal Services at (925) 608-8400 to ask if your pet has been impounded. Animals are held a minimum of 3 business days. If you file a lost pet report with ReportLost, we alert the shelter and local rescue networks immediately.
Which sheriff station should I contact for El Sobrante?
Bay Station serves the El Sobrante area and can be reached at (510) 262-4203. When you report with ReportLost, we direct your information to the right station based on your loss location.
How long does my ReportLost report stay active?
You choose either a 6-month or 12-month search period when you file. For the entire time you select, your report stays in our system and keeps checking for matches across all the local channels, transit systems, and community posts. You'll receive an alert as soon as a credible match appears.
Is ReportLost.org affiliated with the police or official agencies?
No, ReportLost is an independent service. We're not the police or the Sheriff, but we work on your behalf to notify the right official channels, transit authorities, animal services, and community groups so your loss gets the fastest, widest reach. We complement what the Sheriff's office and other services do, and we keep your report active far longer than most services.
Lost & found in nearby cities
Here are the offices that take your report.
File your report in minutes. We'll handle the notifications, the paperwork, and the ongoing search. All you have to do is describe what you lost.
Start my report →ReportLost.org is an independent service and is not affiliated with the Contra Costa Sheriff's Office, AC Transit, WestCAT, Contra Costa Animal Services, or any local municipality. We work to notify these agencies and community channels on your behalf. All contact information, hours, and policies are current as of the last update but may change; always verify directly with each service.