Onondaga

Onondaga may refer to:

Native American/First Nations

 * Onondaga people, a Native American/First Nations people and one of the five founding nations of the Iroquois League
 * Onondaga (village), Onondaga settlement and traditional Iroquois capital
 * Onondaga language

Geology

 * Onondaga Limestone, a layer of dense limestone that outcrops in New York and Ontario, Canada
 * Onondaga Cave State Park, in Leasburg, Missouri, named after the geological formation
 * Onondaga Falls, one of 24 named waterfalls in Ricketts Glen State Park, in Pennsylvania

Canada

 * Onondaga, Ontario, a rural community in the County of Brant, province of Ontario

United States

 * Onondaga County, New York, a county near the center of New York State
 * Onondaga Reservation, a reservation, which is Onondaga Nation territory
 * Onondaga, New York, a town in Onondaga County
 * Onondaga Hill, New York, a hamlet in the Town of Onondaga
 * Onondaga Creek, runs through Syracuse to Onondaga Lake, in Onondaga County
 * Onondaga Lake, adjacent to Syracuse, in Onondaga County
 * Onondaga Lake Park, a park on the eastern shore of Onondaga Lake
 * Onondaga Park, a park on the south side of Syracuse
 * Onondaga Township, Michigan, a township in Michigan's lower peninsula
 * Onondaga, Michigan, an unincorporated community in Onondaga Township

Ships and organizations

 * Onondaga Community College in New York
 * Onondaga Hill Middle School in New York
 * HMCS Onondaga (S73), a submarine in the Royal Canadian Navy
 * USS Onondaga, three ships of the US Navy
 * The Onondagas, nickname of the 122nd New York Volunteer Infantry regiment in American Civil War