The full retirement age for people born in 1937 or before is 65. For those born between 1938 and 1959, the retirement age is between 65 and 67. The full retirement age for people born after 1965 is 67.Information to determine the full retirement age of a person born between 1938 and 1959 is available at the Social Security Administration website.ocate the year of birth of the retiree in the table titled Full Retirement and Age 62 Benefits by Year of Birth. For people born on January 1st, the Social Security Administration uses the previous year as the birth year for calculating full retirement age.