Sir Thomas Johnstone Lipton, 1st Baronet (10 May 1848 – 2 October 1931) was a Scotsman of Ulster Scots parentage who was a self-made man, as company founder of Lipton Tea, merchant, philanthropist and yachtsman who lost 5 America's Cup races.

He engaged extensive advertising for his chain of tea stores and his brand of Lipton teas. He boasted that his secret for success was selling the best goods at the cheapest prices, harnessing the power of advertising, and always being optimistic. He was the most persistent challenger in the history of the America's Cup yacht race.

Lipton was born in a tenement in Crown Street in the Gorbals, Glasgow, on 10 May 1848. His Ulster-Scots parents, Thomas Lipton senior and Frances Lipton (née Johnstone), were from the townland of either Shannock Green or Shankillk (Tonitybog), both near Roslea, in the south-east corner of County Fermanagh in Ulster, not far from Clones in County Monaghan. His parents were married in St. Mark's Church of Ireland Church in Aghadrumsee, near Roslea.

The Liptons had been smallholders in County Fermanagh for generations but, by the late 1840s, Thomas Lipton's parents had been forced to leave Ireland due to the Great Famine of 1845. Moving to Scotland in search of a better living for their young family, the Liptons had settled in Glasgow by 1847. Lipton's father had a number of occupations throughout the 1840s and 1850s, including working as a labourer and as a printer.

Although Lipton later stated that he was born at his family's home in Crown Street in the Gorbals in 1850, there is no record of this in the parish register for that period. In the 1851 census, however, the family were recorded as living in the north of Glasgow, with young Thomas being listed as being 3 years old, suggesting that he must have been born in 1848. Thomas' siblings, three brothers and one sister, all died in infancy, but Thomas, the youngest, survived.

"Tommy" Lipton was educated at St Andrew's Parish School close to Glasgow Green between 1853 and 1863. By the early 1860s his parents owned a shop at 11 Crown Street in the Gorbals where they sold ham, butter and eggs. Thomas Lipton left school at the age of thirteen to supplement his parents' limited income, and found employment as a printer's errand boy, and later as a shirtcutter. He also enrolled at a night school, the Gorbals Youth's School, during this period.

In 1864 Lipton signed up as a cabin boy on a steamer running between Glasgow and Belfast and was captivated by life aboard the ship and the stories told by sailors who had travelled to the United States. After being let go by the steamer company, Lipton quickly used the wages he had saved to purchase passage on a ship bound for the U.S., where he spent five years working and travelling all over the country. Lipton had a number of jobs during this time: at a tobacco plantation in Virginia, as an accountant and book-keeper at a rice plantation in South Carolina, as a door-to-door salesman in New Orleans, a farmhand in New Jersey, and finally as a grocery assistant in New York.

He returned to Glasgow in 1870, initially helping his parents run their small shop in the Gorbals. The following year he opened his first provision shop—Lipton's Market—at 101 Stobcross Street in the Anderston area of Glasgow. This enterprise proved to be successful and Lipton soon established a chain of groceries, first across Glasgow, the rest of Scotland, until finally he had stores throughout Britain. While Lipton was expanding his empire, tea prices were falling and demand was growing among his middle-class customers.