Lett

Lett may refer to:


 * Lett, archaic word for a Latvian
 * Lettish, another name for the Latvian language
 * Lett's Brewery (officially Mill Park Brewery), a brewery based in Enniscorthy, County Wexford, Ireland
 * Lett's Brewery (officially Mill Park Brewery), a brewery based in Enniscorthy, County Wexford, Ireland

Lett as a surname may refer to the following:


 * Alleyne Lett (born 1983), Grenadian decathlete
 * Barbara Lett-Simmons (1927–2012), American politician
 * Benjamin Lett (1813–1858), Irish-Canadian filibusterer
 * Dan Lett, Canadian actor
 * David Lett (1939–2008), founder and winemaker for The Eyrie Vineyards in Oregon
 * Evelyn Lett (1896–1999), Canadian women's rights pioneer
 * Henry William Lett (1836–1920), Irish botanist
 * Leon Lett (born 1968), former American Football defensive tackle
 * Mark Stephen Lett, member of the Governing Body of Jehovah's Witnesses
 * Michael Lett (born 1987), Rugby League player who plays for the Sydney Roosters in the National Rugby League (NRL) competition
 * Stephen Lett (1847–1905), Irish-Canadian physician and writer
 * Sherwood Lett (1895–1964), Canadian soldier, lawyer, diplomat, and jurist
 * Steven Lett (born 1958), American diplomat and chief executive of the International Cospas-Sarsat Programme in Montreal, Canada
 * William Pittman Lett (1819–1892), Irish-Canadian journalist
 * William Pittman Lett (1819–1892), Irish-Canadian journalist
 * William Pittman Lett (1819–1892), Irish-Canadian journalist
 * William Pittman Lett (1819–1892), Irish-Canadian journalist