LONDON  Millvina Dean, who as an infant passenger aboard the Titanic was lowered into a lifeboat in a canvas mail sack and lived to become the ship’s last survivor, died Sunday at a nursing home in Southampton, the English port from which the Titanic embarked on its fateful voyage, according to staff at the home.

She was 97 and had been in poor health for several weeks.

The youngest of the ship’s 705 survivors, Ms. Dean was only 9 weeks old when the Titanic hit an iceberg in waters off Newfoundland on the night of April 14, 1912, setting off what was then considered the greatest maritime disaster in history.

She survived with her mother, Georgetta, and 2-year-old brother when they, like many other survivors, were picked up by the liner Carpathia and taken to New York.

Her father, Bertram Dean, was among more than 1,500 passengers and crew members who died in the sinking, a fact that Ms. Dean, in an interview at the Southampton nursing home last month, attributed partly to the fact that the Dean family was traveling in third class, or steerage, as the cheapest form of passage was known.