Joseph Robinette Biden Jr. was born on November 20, 1942, [1] at St. Mary's Hospital in Scranton, Pennsylvania, [2] to Catherine Eugenia "Jean" Biden (née Finnegan) [3] and Joseph Robinette Biden Sr. [4] He is the oldest child in a Catholic family of mostly Irish descent. Biden has a sister, Valerie, and two brothers, James and Francis. [5] REUTERS/Agustin Marcarian/File Photo (Reuters) - U.S. President Joe Biden turned 82 years old on Wednesday, an age milestone never before reached by a sitting commander in chief. Some Lesser Known Facts About Joe Biden Joe ’s mother was of Irish descent, and his father was of Irish-French-English descent. According to him, his grandfather was forced to leave Ireland and relocate to the United States because of the British authorities. Biden spent his early childhood with his maternal grandparents as his father’s business incurred losses. Thereafter, he and his family relocated to Boston, where they purchased a four-bedroom house. Find out the age of Joe Biden and other US presidents when they took office. See the list of 44 presidents by their age , from youngest to oldest, and the records for the oldest and youngest presidents.