In 1890, Selfridge married Rosalie "Rose" Buckingham of the prominent Buckingham family of Chicago.
Her father was Benjamin Hale Buckingham, who was a member of a very successful family real estate business established by her grandfather, Alvah Buckingham.
At 30-years-old, Rose was a successful property developer, having inherited money and expertise from her family.
Rose had purchased land in Harper Ave, Hyde Park, Chicago and built 42 villas and artists cottages within a landscaped environment.
The couple had five children: three girls and two boys (though their first son died soon after birth).

At the height of his success, Selfridge leased Highcliffe Castle in Hampshire, from Major General Edward James Montagu-Stuart-Wortley.
In addition, he purchased Hengistbury Head, a mile-long promontory on England's southern coast, where he planned to build a magnificent castle; these plans never got off the drawing board, however, and in 1930 the Head was put up for sale.
Although only a tenant at Highcliffe, he set about fitting modern bathrooms, installing steam central heating and building and equipping a modern kitchen.
During World War I, Rose opened a tented retreat called the Mrs Gordon Selfridge Convalescent Camp for American Soldiers on the castle grounds.
Selfridge gave up the lease in 1922.

Selfridge's wife Rose died during the influenza pandemic of 1918; his mother died in 1924.
As a widower, Selfridge had numerous liaisons, including those with the celebrated Dolly Sisters and the divorcée Syrie Barnardo Wellcome, who would later become better known as the decorator Syrie Maugham.
He also began and maintained a busy social life and entertained lavishly both at his home in Lansdowne House, located at 9 Fitzmaurice Place, Mayfair, just off Berkeley Square, and on his private yacht, the SY Conqueror, with VIP guests such as Rudyard Kipling cruising the Mediterranean.
 Lansdowne House displays a blue plaque noting that Gordon Selfridge lived there from 1921 to 1929.
In 1890, Selfridge married Rosalie "Rose" Buckingham of the prominent Buckingham family of Chicago. Her father was Benjamin Hale Buckingham, who was a member of a very successful family real estate business established by her grandfather, Alvah Buckingham. At 30-years-old, Rose was a successful property developer, having inherited money and expertise from her family. Rose had purchased land in Harper Ave, Hyde Park, Chicago and built 42 villas and artists cottages within a landscaped environment. The couple had five children: three girls and two boys (though their first son died soon after birth).
At the height of his success, Selfridge leased Highcliffe Castle in Hampshire, from Major General Edward James Montagu-Stuart-Wortley. In addition, he purchased Hengistbury Head, a mile-long promontory on England's southern coast, where he planned to build a magnificent castle; these plans never got off the drawing board, however, and in 1930 the Head was put up for sale. Although only a tenant at Highcliffe, he set about fitting modern bathrooms, installing steam central heating and building and equipping a modern kitchen. During World War I, Rose opened a tented retreat called the Mrs Gordon Selfridge Convalescent Camp for American Soldiers on the castle grounds. Selfridge gave up the lease in 1922.
Selfridge's wife Rose died during the influenza pandemic of 1918; his mother died in 1924. As a widower, Selfridge had numerous liaisons, including those with the celebrated Dolly Sisters and the divorcée Syrie Barnardo Wellcome, who would later become better known as the decorator Syrie Maugham. He also began and maintained a busy social life and entertained lavishly both at his home in Lansdowne House, located at 9 Fitzmaurice Place, Mayfair, just off Berkeley Square, and on his private yacht, the SY Conqueror, with VIP guests such as Rudyard Kipling cruising the Mediterranean.  Lansdowne House displays a blue plaque noting that Gordon Selfridge lived there from 1921 to 1929.
Harry Gordon Selfridge