List of senior societies

Senior societies are a type of collegiate student organization that recruits juniors and seniors. Senior societies are associated with Dartmouth College, the University of Pennsylvania, and Yale University. These societies can be activity-based, identity-based, school-based, or traditional. Senior societies may be "landed", owning a building or tomb, or "non-landed".
Baird's Manual of American College Fraternities, notes that Phi Beta Kappa, founded at the College of William & Mary in 1776, was the first senior society. At Dartmouth College, senior societies date back to 1783 with the founding of an organization called the Society of Social Friends. Dartmouth currently had fourteen active senior societies. Yale has more than forty active senior societies. The oldest senior society at Yale is Skull and Bones, established in 1831, followed by Scroll and Key in 1841. Other colleges have similar organizations but use different terminology. For example, there are Princeton University eating clubs and Harvard University final clubs.
Senior societies tend to be exclusive, and members pay dues to belong. Members are most often recruited by a process called "tapping". Membership in each senior society tends to be small, averaging around fifteen active members. Some senior societies are also secret societies, where the names of members are kept secret, while others are open and share their membership rolls. Other senior societies are semi-secret, keeping member's names a secret until graduation. Some senior societies also are considered honor societies.
Following is an incomplete list of collegiate senior societies.

Society	Charter date and range	Institution	Type
100 Senior Honorary	2005	Emory University
Abaris	1996	Dartmouth College	Traditional
Agaia		Yale University
Agora		Yale University
Andromeda	2013	Dartmouth College	Traditional
The Apostles		Yale University
Atlas	2013	Dartmouth College	Traditional
Aurelian Honor Society	1910	Yale University	Traditional, secret
B&C		Yale University
BaR		Yale University
Bell Senior Society	2014	University of Pennsylvania	Activity-based
Belmonte		Yale University
Berzelius (secret society)	1848	Yale University	Traditional, secret
Beta Omega	1841–xxxx ?	Kenyon College	Traditional
Book and Snake	1863	Yale University	Traditional, secret
C&D		Yale University
Cage and Feather		Yale University
Cane Club	1921– xxxx ?	Johns Hopkins University	Traditional
Cap and Skull	1900	Rutgers University	Traditional
Carriage Senior Society	2013	University of Pennsylvania	Identity-based
Casque and Gauntlet	1887	Dartmouth College	Traditional
Ceres Athena		Yale University
C.C.C.	1876–xxxx ?	University of California, Berkeley
Chimera	1914	Dartmouth College	Traditional, secret
Cipactli Latinx Honor Society	2001	University of Pennsylvania	Identity-based
Clio	1999	Dartmouth College	Traditional, secret
Cloak and Dagger		Yale University
Cobra	1978	Dartmouth College	Traditional
Cong		Yale University
Cup and Crown		Yale University
De Gang	1891–1910s	Johns Hopkins University	Traditional
Delta Kappa Delta	18xx ?–xxxx ?	Marietta College	Traditional
Deru	1896	Northwestern University	Activity-based
Desmos	1950–1967, 2010	Yale University	Traditional, secret
Double Cuffs	2010	Yale University
Dragon Society	1898	Dartmouth College	Traditional, secret
DSG	1989	Yale University	Traditional, secret
DVS Senior Honor Society	1902	Emory University	Activity-based
Elephant and Coffin	18xx ?–xxxx ?	City College of New York	Traditional
Elihu Club	1903	Yale University	Traditional
Fire and Skoal	1975	Dartmouth College	Traditional
Fork & Knife		Yale University
Friars Senior Society	1899	University of Pennsylvania	Traditional
Griffin	1995	Dartmouth College	Traditional
Gryphon		Yale University
Gryphon Senior Society	2020	University of Pennsylvania	School-based
Helios Society	2015	Yale University
Hexagon	1910	University of Pennsylvania	School-based
Ink and Needle		Yale University
Innominatum		Yale University
Iris		Yale University
Iron Key		Purdue University	Activity based, secret
ISO		Yale University
Kinoki Senior Society	2014	University of Pennsylvania	Activity-based
Lantern Society	1993	University of Pennsylvania	School-based
LC		Yale University
Leviathan		Yale University
Lincoln		Yale University
Linonian Society	1753–xxxx ?, 19xx ?	Yale University	Traditional, secret
Lion's Paw Senior Society	1908	Pennsylvania State University	Activity-based
Looking Glass		Yale University
LSV Society	1907	University of Missouri
Mace and Chain	1956	Yale University	Traditional, secret
Manuscript Society	1951	Yale University	Traditional
Mortar Board	1918	National	Traditional
Myth and Sword	1875–1965, 199x ?	Yale University	Traditional, secret
Nacoms	1898	Columbia University	Activity-based
Nathan Hale		Yale University
Nightingales	2011	University of Pennsylvania	School-based
Octa		Yale University
Olympus	2014	Dartmouth College	Traditional
Onyx Senior Society	1974	University of Pennsylvania	Identity-based
Oracle Senior Society	2003	University of Pennsylvania	Identity-based
Order of the Sirens	2007	Dartmouth College	Traditional
Osiris	2016	Dartmouth College	Traditional
Osiris Senior Society	2013	University of Pennsylvania	Activity-based
Osiris Society	1903	Massachusetts Institute of Technology	Traditional
Owl and Key	1909	University of Utah	Traditional
Owl and Serpent	18xx ?–xxxx ?	Wesleyan University	Traditional
Owl and Wand	1868–1960s	Wesleyan University	Traditional
OX		Yale University
Palaeopitus Senior Society	1899	Dartmouth College	Activity-based
Pew		Yale University
Phi Chi	18xx ?–xxxx ?	Bowdoin College	Traditional
Phoenix	1984	Dartmouth College	Traditional
The Pithotomy Club	1893–1992	Johns Hopkins University	School-based
Phrygian	2005	Dartmouth College	Traditional, secret
Praetorian		Yale University
Prince		Yale University
The Pundits	1884	Yale University	Activity-based
Pyxis	2014	Dartmouth College	Traditional
Quaternion Club	1903–2023	Furman University	Traditional, men
Quaternion Senior Order	2023	Furman University	Traditional, coed
Quill and Dagger	1883	Cornell University	Traditional
Red Dragon Society	1898	New York University	Traditional, secret
Red Mask		Yale University
Ring and Candle	xxxx ?–c. 1975, 2015	Yale University
Sachems	1915	Columbia University	Activity-based, secret
Sage and Chalice		Yale University	Traditional, secret
St. Elmo Society	1963	Yale University	Traditional, secret
Scarabbean Senior Society	1915	University of Tennessee	Activity-based, secret
Scroll and Key	1842	Yale University	Traditional, secret
Senior Order	1937-2023	Furman University	Traditional, women
The Senior Society	1892	Johns Hopkins University	Traditional
Shamash Senior Society	2018	University of Pennsylvania	Identity-based
Sigma Society	1880	Washington and Lee University	Traditional, secret
Skull and Bones	1832	Yale University	Traditional, secret
Skull & Keys	1882–c. 1980	University of California, Berkeley	Traditional, secret
Snakes Society	1993	University of Pennsylvania	School-based
Society of Fox and Chariot	2015	Yale University
Spade and Grave	1864	Yale University	Traditional, secret
Sphinx	1886	Dartmouth College	Traditional, secret
Sphinx Head	1890	Cornell University	Activity-based
Sphinx Senior Society	1900	University of Pennsylvania	Traditional
Society of Saint Thomas Aquinas	2010	Yale University	Traditional
Society of Social Friends	1783–xxxx?	Dartmouth College	Traditional
Tau Club	1891–1911	Johns Hopkins University	Traditional
TDC		Yale University
Tejas Club	1925	University of Texas at Austin
Torch Honor Society	1916–196x ?, 1995	Yale University	Traditional
Trident and Shell	18xx ?–xxxx ?	University of Michigan	Traditional
Tyger	1892	Dartmouth College	Traditional, secret
Vulcan Senior Engineering Society	1904	University of Michigan	School-based
Whiskey and Coke		Yale University
WIPS		Yale University	Identity-based
Wolf's Head Society	1883	Yale University	Traditional
XV		Yale University