Where could i get a copy of my immunization records if the doctor retired over 10 years ago?

Office, if lucky: Hopefully your doctor's office has maintained his or her medical records and you could request a copy from them. That said, depending on the doctor's office location, they may only be required to keep the records for 7 years (not 10), and may have shredded them. But most offices keep copies longer than the legal requirement so you may be in luck.

Other sources: Dr weiss's answer is correct. In addition, some states have an electronic data base with immunization records.Also the schools you attended should have copies of your immunizations.

Schools/ home copy: There are some states that maintain registries that require only secure access and a name. Your retired doc may have left records with another doc. You past schools/college applications/ etc may have the list. My state requires that I keep records at least 7 years from the last visit or to the age 21(whichever is latest) before destruction.