Elizabeth was the elder daughter of Albert, duke of York, and his wife, Lady Elizabeth Bowes-Lyon. As the child of a younger son of King George V, the young Elizabeth had little prospect of acceding to the throne until her uncle, Edward VIII (afterward duke of Windsor), abdicated in her father's favour on December 11, 1936, at which time her father became King George VI and she became heir presumptive. The princess's education was supervised by her mother, who entrusted her daughters to a governess, Marion Crawford; the princess was also grounded in history by C.H.K. Marten, afterward provost of Eton College, and had instruction from visiting teachers in music and languages. During World War II she and her sister, Princess Margaret Rose, perforce spent much of their time safely away from the London blitz and separated from their parents, living mostly at Balmoral Castle in Scotland and at the Royal Lodge, Windsor, and Windsor Castle.

Beginning in November 1953 the queen and the duke of Edinburgh made a six-month round-the-world tour of the Commonwealth, which included the first visit to Australia and New Zealand by a reigning British monarch. In 1957, after state visits to various European nations, she and the duke visited Canada and the United States. In 1961 she made the first royal British tour of the Indian subcontinent in 50 years, and she was also the first reigning British monarch to visit South America (in 1968) and the Persian Gulf countries (in 1979). During her “Silver Jubilee” in 1977, she presided at a London banquet attended by the leaders of the 36 members of the Commonwealth, traveled all over Britain and Northern Ireland, and toured overseas in the South Pacific and Australia, in Canada, and in the Caribbean.

She is known to favour simplicity in court life and is also known to take a serious and informed interest in government business, aside from the traditional and ceremonial duties. Privately she has become a keen horsewoman; she keeps racehorses, frequently attends races, and periodically visits the Kentucky stud farms in the United States. Her financial and property holdings have made her one of the world's richest women.