Attorneys are not necessarily notary publics. But they can be. In the same spirit, you can be a notary without becoming a lawyer.
A notary public is someone who certifies and attests to the authenticity of writings and takes depositions and affidavits, among other duties. The National Notary Association states that there are 4.4 million notaries in the United States. They are all in service to the state or territory that issues their commission.