- The New York State Department of Health (NYSDOH)
- The NYC Department of Health and Mental Hygiene (DOHMH) for birth records that occurred in New York City
- The county clerk's office in the county where the birth occurred
These entities can provide both original birth certificates and certified copies, which have the same legal effect as originals. Notarized copies of birth certificates are generally not recognized as valid and may not be accepted for legal or official purposes.