Lost something in Mill Valley? Here are the offices that take your report.
File a single report and we'll route it to the Mill Valley Police Department, local transit services, and active community channels. Your report stays active, continuously searching 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
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 file your loss
Tell us what you lost, where, and when. We handle the details, so you don't have to figure out which agency takes what.
We route it for you
We notify the Mill Valley Police Department, Marin Transit if needed, and publish to local community networks. You're covered across all the right channels.
Your report keeps searching
While you move forward, your report stays active and monitors for matches across local posts, lost & found databases, and community alerts. We alert you the moment a credible lead surfaces.
Where Lost Items Go in Mill Valley
From the Police Department to local businesses and transit, here's the full picture.
Mill Valley Police Department
The central clearinghouse for lost property in town. Items found on the street or turned in to local businesses often end up here. We'll file your report directly with their Lost and Found office and generate all the information they need.
Marin Transit
Lost something on a Marin Transit bus? Their Lost and Found team holds items and cross-references reports. We'll make sure your description reaches them quickly.
San Francisco & San José Airports
If your loss happened at SFO or San José International during travel, both airports maintain dedicated Lost and Found offices. We can point you to the right terminal desk or contact line.
Lost or Found Pet
If you've lost a cat or dog in Mill Valley, time is critical. Marin Humane and local rescue networks are your first contact. Community Facebook groups like Lost and Found Pets of Marin/Sonoma County also get immediate visibility. File a priority lost pet report to jumpstart your search across shelters and rescue networks.
⚠️ Spotted incorrect or outdated information? Let us know so we can review it.
Your Next Step
The sooner your report is filed and routed, the sooner the community can help you find your lost item. A few minutes now means weeks of automated searching ahead.
Report my lost item →Mill Valley's neighborhoods spread across tree-lined streets and hillsides, from downtown to residential pockets near Strawberry Hill and Locust Avenue. When you lose a wallet, ring, or phone here, you're suddenly juggling calls to the Police Department, checking local Facebook groups, and hoping someone posts on Nextdoor. Each channel operates independently, and time matters.
ReportLost consolidates that effort into one simple report. We connect you with the Mill Valley Police Department's Lost and Found office, alert community channels, and keep your case active for months. Instead of checking back daily, your report works for you, automatically matching any new found items against your description. Peace of mind starts with a single form.
Popular Places to Lose Things in Mill Valley
From town center to residential routes, here's where losses most often happen.
Downtown Mill Valley
Shops, restaurants, and sidewalk cafés along Mill Valley Boulevard and Throckmorton Avenue. Wallets and phones slip away here regularly, especially near the public transit stops.
Shoreline Park & Trails
Hiking trails and scenic overlooks where rings, sunglasses, and backpacks are left behind or fall out of pockets. Local hikers and visitors frequent this area year-round.
Locust Avenue Residential
Quieter neighborhood streets where dog walkers pass regularly. Leashes, phones, and personal items slip from hands more often than you'd think.
Transit Stops & Bus Routes
Marin Transit bus stops and shelters throughout town. Commuters leave behind purses, bags, and daily carry items during boarding and transfers.
Community Channels That Help
Your report reaches these networks automatically, but you can also post directly.
Facebook group with thousands of local members sharing sightings and recoveries
Hyper-local posts reach your immediate neighborhood quickly
Reddit's Marin County subreddit, active for local lost & found threads
Dedicated lost pet database covering Mill Valley and surrounding areas
Common Questions
How long does Mill Valley Police hold lost items before discarding them?
Mill Valley Police Department keeps lost property for a standard retention period. Contact them directly at 415-388-4033 (Monday–Thursday, 8 am–5 pm, closed 12–1 pm) to ask about your specific item and timeline. ReportLost will file your report with them so your item is flagged if it arrives.
Can I check if my item is already at a lost and found office?
Yes, you can call the Police Department or visit in person at 1 Hamilton Drive, Mill Valley, CA 94941. However, ReportLost handles this inquiry for you and will contact them on your behalf, saving you the calls and follow-ups.
What if I lost something on a Marin Transit bus?
Call Marin Transit Customer Service at 415-455-2000 (7 am–6 pm weekdays) to check their Lost and Found. We'll submit your report to them and ensure they have your contact info and a detailed description.
How do I report a lost pet in Mill Valley?
Contact Marin Humane at 415-883-4621 immediately, and post to the Lost and Found Pets of Marin/Sonoma County Facebook group. ReportLost offers a dedicated lost pet report that alerts all these channels simultaneously, cutting your notification time from hours to minutes.
How long does ReportLost keep my report active?
Your report stays active for 12 months, depending on the tier you choose. Throughout that period, we continuously match new found items and community posts against your description. If a credible match appears, we notify you right away so you don't have to refresh the feeds yourself.
Is ReportLost.org official or affiliated with the Mill Valley Police Department?
ReportLost.org is an independent service, not a government agency or official police department tool. However, we work with police departments and local services to deliver your report to the right desks. We're a shortcut that saves you time reaching all the right channels and ensures your case stays active longer than a single phone call. Always file a report with the police if your item involves a crime, and ReportLost will support that process.
Lost & found in nearby cities
File Your Report Now
The longer you wait, the colder your trail becomes. Get your report filed, routed to all the right places, and actively searching within minutes.
Start my report →ReportLost.org is an independent service and is not affiliated with the Mill Valley Police Department, Marin Transit, City of Mill Valley, or any other government agency mentioned on this page. Our service complements official channels and does not replace direct contact with law enforcement or local authorities. Always contact the police directly to file a report if a crime is suspected. Links provided are to official websites and services operated by those entities; we do not control, operate, or endorse any third-party lost and found services or databases.