What is a bar number?
A bar number is the ID a state gives each lawyer it licenses. Here is what it is used for, where to find it, and why some states don't publish it. 3 min read
When a state admits a lawyer to practice, it gives them an identification number. Depending on the state it may be called a bar number, an attorney registration number, a license number or an attorney ID. It stays with the lawyer for their whole career in that state, even if they move or change their name.
What it is used for
- Identifying the right person. Two lawyers can share a name; they never share a bar number in the same state. It is the most reliable way to look someone up in the official records.
- Court filings. Many courts require the lawyer's bar number on documents they file, so the court can confirm the lawyer is licensed.
- Discipline and registration records. The state uses the number to track dues, continuing education and any disciplinary history.
Where to find a lawyer's bar number
Look on court papers the lawyer filed, on their letterhead or website (some states require it in certain advertising), or in the state's official attorney lookup. You can also simply ask; a licensed lawyer will tell you.
One number per state
A lawyer licensed in three states has three numbers, one from each state. A number from one state says nothing about the lawyer's status in another, so check the state where your matter is.
Why some records don't show one
Not every state publishes bar numbers in the records it releases. Some withhold them, and some public lists include only names and cities. When a state's records don't include a number, LawyersIndex shows its own LawyersIndex ID on the profile so the profile can be linked to and kept the same from one update to the next. A LawyersIndex ID is not a state license number; use the official lookup to confirm a license.
Is it private?
No. In the states that publish them, bar numbers are public information. They are not like a Social Security number and cannot be used to access a lawyer's accounts. A lawyer's home address and personal email are a different matter; many states keep those private.
Related guides
- How to find the right lawyer for your legal problem
- How to check that a lawyer is licensed and in good standing
- Questions to ask a lawyer at your first consultation
- How to find free or low-cost legal help
This guide is general information, not legal advice, and laws differ from state to state. For advice about your situation, talk to a lawyer licensed in your state. Last reviewed November 4, 2026.