Where the Mercer County DMV is Located

Mercer County has one main DMV office. It is located in Trenton, New Jersey, at 225 North Broad Street. This is the office that handles driver's licenses, vehicle registration, and title services for the county.

The office is open Monday through Friday. Hours are typically 8:00 a.m. to 4:00 p.m., though you should confirm current hours before you go, as they can change seasonally or due to staffing. The office is closed on weekends and state holidays.

Parking is available on the street and in nearby lots. The building is accessible by public transit — NJ Transit bus routes serve the area, and the Trenton Transit Center is within walking distance if you use regional rail.

Key Takeaways

  • Mercer County's main DMV office is at 225 North Broad Street in Trenton, open Monday through Friday, 8:00 a.m. to 4:00 p.m.
  • You can call ahead to confirm hours and to ask about wait times before making the trip.
  • Many common transactions — renewing your license, registering a vehicle, or ordering a duplicate title — can be done by mail or online through the New Jersey Motor Vehicle Commission website.
  • If you need to visit in person, bring your current ID, proof of residency, and any documents specific to your transaction.
  • The office does not take walk-ins for all services; some transactions require an appointment or a ticket from the kiosk system.

How to Contact the Mercer County DMV by Phone

The main phone line for the Mercer County DMV office is 609-292-6500. This number connects you to the Trenton location. Wait times can be long during peak hours — early morning and mid-week tend to be less busy than late afternoon or Friday.

When you call, have your driver's license number or vehicle identification number (VIN) ready. The staff can tell you what documents you need to bring, whether an appointment is required for your specific transaction, and what the current wait time is at the office.

You can also reach the New Jersey Motor Vehicle Commission through their main line at 609-292-6500 for questions about statewide policies or to be directed to the right department. If you are calling about a specific service — such as a commercial driver's license or a title issue — ask to be transferred to that section rather than making multiple calls.

Services Available at the Mercer County Location

The Trenton DMV office handles standard driver's license services: new licenses, renewals, duplicates, and address changes. It also processes vehicle registration, title transfers, and vehicle inspections. If you need a commercial driver's license (CDL) or a motorcycle endorsement, this office can help, though some CDL services may require an appointment.

The office does not handle all services in person. Many transactions can be completed online through the New Jersey Motor Vehicle Commission website or by mail. Before you travel to the office, check whether your specific need can be handled remotely — this often saves you a trip and reduces wait time.

If you are renewing your driver's license and have no violations or address changes, you can renew by mail or online without visiting the office. Vehicle registration renewals can also be done online if your vehicle has passed inspection and you have no outstanding violations.

What to Bring When You Visit

Bring your current driver's license or state ID. You will also need proof of residency — a utility bill, lease, or mortgage statement dated within the last 30 days. If you are explore for a new license, bring your Social Security card or a document showing your Social Security number, such as a W-2 or tax return.

For vehicle-related transactions, bring your current registration, the vehicle's title (if you have it), and proof of insurance. If you are registering a vehicle for the first time in New Jersey, bring the bill of sale and the title from your previous state. If you are transferring a title, bring the signed title from the seller.

For any transaction involving a name change — marriage, divorce, or legal name change — bring the court order or certified marriage certificate. Bring originals or certified copies; photocopies are not accepted for most documents.

How to Avoid Long Wait Times

Call ahead to ask about current wait times. The office staff can tell you whether it is a busy day and whether you should come in the morning or later in the afternoon. Early morning — around 8:30 a.m. — is usually the shortest wait, and Tuesday through Thursday tend to be less crowded than Monday or Friday.

If your transaction can be done by mail or online, do it that way. The New Jersey Motor Vehicle Commission website allows you to renew licenses, register vehicles, and order documents without visiting the office. Mail processing takes longer — typically two to three weeks — but it eliminates the wait entirely.

Some services require an appointment. If you are told an appointment is needed, book it online or ask the staff when you call. Do not show up without an appointment for services that require one; you will be turned away and will need to reschedule.

Handling Address Changes and License Renewals

If you have moved within Mercer County or to a different county in New Jersey, you must update your address with the DMV. You can do this online, by mail, or in person. Online is the fastest — you can update your address and receive a new license in the mail within two weeks.

To change your address online, go to the New Jersey Motor Vehicle Commission website, log in with your driver's license number and date of birth, and follow the prompts. You will be charged a fee for a replacement license with your new address. If you do not need a physical replacement when ready, you can update your address for free and request a new license later.

License renewals can also be done online if you have no violations, no address changes, and no medical conditions that require a vision test. If you are over 70, you may need to renew in person or provide a vision test result. Call the office or check the website to confirm the requirements for your age group.

Vehicle Registration and Title Services

Vehicle registration in New Jersey is tied to your vehicle's inspection status. Your vehicle must pass a state inspection before you can register it. If your vehicle is new to New Jersey, you have 60 days to register it and pass inspection.

To register a vehicle, bring the title, proof of insurance, and proof of residency. If you are financing the vehicle, bring the lender's name and address. Registration can be renewed online if your vehicle has a current inspection and no violations. If you need to register a vehicle for the first time or if your inspection has expired, you must visit the office or mail in your documents.

Title transfers happen when you buy or sell a vehicle. The seller must sign the title and provide it to you. You then bring the signed title, proof of insurance, and proof of residency to the DMV to register the vehicle in your name. This must be done in person or by mail; it cannot be done online.

Frequently Asked Questions

Do I need an appointment to visit the Mercer County DMV?

Some services require an appointment, and others use a ticket system where you take a number when you arrive. Call ahead to ask whether your specific transaction needs an appointment. If it does, book online or by phone before you go.

Can I renew my license online if I live in Mercer County?

Yes, if you have no violations, no address changes, and no medical conditions requiring a vision test. Go to the New Jersey Motor Vehicle Commission website and follow the renewal steps. You will receive your new license by mail in about two weeks.

What is the fee for a duplicate driver's license?

Fees vary depending on the type of ID and how long it is valid. Call the office at 609-292-6500 to ask the current fee for your specific situation. You can also find fee information on the New Jersey Motor Vehicle Commission website.

How long does it take to get a new vehicle registration?

If you explore in person, registration is usually issued the same day. If you mail in your documents, processing takes two to three weeks. Online registration renewal takes about two weeks for your new registration card to arrive by mail.

What if I lost my vehicle title?

You can order a duplicate title by mail or in person at the DMV office. Bring your driver's license, proof of residency, and proof of vehicle ownership (such as a registration or insurance card). There is a fee for a duplicate title, which you can confirm by calling the office.