Linonia is a literary and debating society founded in 1753 at Yale University.
|The Linonian Society of Yale University|
|Motto||Amicitia Concordia Soli Noscimus
(Latin for "We alone learn in friendship and harmony")
|Formation||September 12, 1753|
|Region served||New Haven, CT, USA|
Linonia was founded in 1753 as Yale University's second literary and debating society. By the late eighteenth century, all incoming freshmen at Yale College became members either of Linonia or its rival society, Brothers in Unity, which was founded in 1768. Other debating societies arose throughout the eighteenth and early nineteenth century, notably Crotonia in 1738 and Calliope in 1819, but were relatively short-lived. By the end of the Civil War, the social dominance of Linonia and Brothers began to decline, and the debating society system ultimately evolved into the Yale Union and later in 1934, the Yale Political Union.
Following this shift, the Linonian Society was reconstituted in the mold of Yale's other collegiate secret societies. However, instead of tapping only rising seniors, it draws from the Yale Law School, Yale Graduate School and Yale School of Management, in addition to Yale College students. According to tradition, Linonia participates in Yale's tap night during the second week of April. In contrast to other biography oriented societies, meetings often involve debate on intellectual and political topics.
Linonia and Sterling Memorial Library 
At the time of the formation of Yale's central library in 1871, Linonia and Brothers donated their respective literary collections to the university. Both societies had kept substantial collections of works not deemed suitable by the Yale faculty, which did not teach English literature until the late nineteenth century. The donation is commemorated in the Linonia and Brothers Reading Room at Yale's Sterling Memorial Library. The reading room contains the Linonia and Brothers (L&B) collection, a travel collection, a collection devoted to medieval history, and a selection of new books recently added to Sterling’s collections.
The Linonian Society, Brothers in Unity, and Calliope are all commemorated with their own courtyards in Branford College.
Prominent members 
- Timothy Dwight IV - Class of 1767 - An American academic and educator, a Congregationalist minister, theologian, and author. He was the eighth president of Yale College (1795–1817)
- David Humphreys (soldier) - Class of 1771 - an American Revolutionary War colonel and aide de camp to George Washington, American minister to Portugal and then to Spain, entrepreneur who brought Merino sheep to America and member of the Connecticut state legislature. A poet and author, he was one of the "Hartford Wits."
- Abraham Baldwin - Class of 1772 - An American politician, Patriot, and Founding Father from the U.S. state of Georgia. Baldwin was a Georgia representative in the Continental Congress and served in the United States House of Representatives and Senate after the adoption of the Constitution. Baldwin was the founding father of the University of Georgia, first state-charted public institution of higher education in the United States and served as its first president.
- Nathan Hale - Class of 1773 - Spy for General George Washington and the state hero of Connecticut
- James Hillhouse - Class of 1773 - An American lawyer, real estate developer, and politician from New Haven, Connecticut. He represented Connecticut in both the U.S. House and Senate
- Eli Whitney - Class of 1789 - An American inventor best known for inventing the cotton gin
- Jeremiah Day - Class of 1789 - An American academic, a Congregational minister and President of Yale College (1817–1846).
- John C. Calhoun - Class of 1804 - Member of the United States House of Representatives, Member of the United States Senate, Vice President of the United States, Secretary of War, and Secretary of State
- James Fenimore Cooper - Class of 1806 - A prolific and popular American writer of the early 19th century, author of Last of the Mohicans
- Henry Leavitt Ellsworth - Class of 1810 - A Yale-educated attorney who became the first Commissioner of the U.S. Patent Office, where he encouraged innovation by inventors Samuel F.B. Morse and Samuel Colt. Ellsworth also served as the second president of the Aetna Insurance Company, and was a major donor to Yale College, a commissioner to Indian tribes on the western frontier, and the founder of what became the United States Department of Agriculture.
- Roger Sherman Baldwin- Class of 1811 - An American lawyer involved in the Amistad case, who later became the 32nd Governor of Connecticut and a United States Senator.
- Asa Thurston - Class of 1818 - First American Christian Missionary to the Hawaiian Islands.
- Nathaniel Parker Willis - Class of 1827 - An American author, poet and editor who worked with several notable American writers including Edgar Allan Poe and Henry Wadsworth Longfellow. He became the highest-paid magazine writer of his day
- Frederick Augustus Porter Barnard - Class of 1828 - A classical and English scholar, a mathematician, a physicist, a chemist, and a good public speaker. He was the tenth president of Columbia University in New York City. Barnard strove to have educational privileges extended by the university to women as well as to men, and Barnard College
- Noah Porter - Class of 1831 - An American academic, philosopher, author, lexicographer and President of Yale College (1871–1886).
- Ebenezer Kingsbury Hunt - Class of 1833 - a prominent physician in Hartford, Connecticut. The E. K. Hunt Chair (i.e., Professorship) of Anatomy at Yale University is named after Ebenezer Kingsbury Hunt.
- William M. Evarts - Class of 1837 - An American lawyer and statesman who served as U.S. Secretary of State, U.S. Attorney General and U.S. Senator from New York.
- Josiah Whitney - Class of 1839 - An American geologist, professor of geology at Harvard University, and chief of the California Geological Survey. Mount Whitney, the highest point in the continental United States, and the Whitney Glacier, the first confirmed glacier in the United States were both named after him by members of the Survey.
- Andrew Dickson White - Class of 1837 - A U.S. diplomat, historian, and educator, who was the co-founder of Cornell University.
- Timothy Dwight V - Class of 1849 - An American academic, an educator, a Congregational minister, and president of Yale College (1886–1898). During his years as head of the institution, Yale developed as a university.
- Daniel Coit Gilman - Class of 1852 - Founder of the Sheffield Scientific School at Yale College, and who subsequently served as one of the earliest presidents of the University of California, the first president of Johns Hopkins University, and as founding president of the Carnegie Institution. He was also co-founder of the Russell Trust Association, which administers the business affairs of Yale's Skull and Bones society.
- Chauncey Mitchell Depew - Class of 1856 - The attorney for Cornelius Vanderbilt's railroad interests, president of the New York Central Railroad System, and a United States Senator from New York from 1899 to 1911.
- Francis Miles Finch - Class of 1859 - An American judge, poet, and academic associated with the early years of Cornell University. One of his poems, "The Blue and the Gray", is frequently reprinted to this day.
- Walter Camp - Class of 1875 - An American football player, coach, and sports writer known as the "Father of American Football"
- William Howard Taft - Class of 1878 - The 27th President of the United States (1909–1913) and later the tenth Chief Justice of the United States (1921–1930). He is the only person to have served in both of these offices.
- F. Trubee Davison - Class of 1918 - An American World War I aviator, Assistant US Secretary of War, Director of Personnel for the Central Intelligence Agency, and President of the American Museum of Natural History