Native American/First Nations

• The Onondaga people are a Native American group and one of the five original members of the Iroquois League.
• The Onondaga village was a settlement and the traditional capital of the Iroquois people.
• The Onondaga language is the language spoken by the Onondaga people.

Geology

• Onondaga Limestone, a thick layer of limestone that is exposed above ground in New York and Ontario, Canada
• Onondaga Cave State Park, located in Leasburg, Missouri, named because of the Onondaga Limestone rock formation
• Onondaga Falls, one of 24 waterfalls that have names in Ricketts Glen State Park, Pennsylvania

Places

• Onondaga, Ontario: a rural community located in Brant County, Ontario
• Onondaga County, New York: a county in the central part of New York State
• Onondaga Reservation: a reservation that is part of the Onondaga Nation's territory
• Onondaga, New York: a town within Onondaga County
• Onondaga Hill, New York: a hamlet in the Town of Onondaga
• Onondaga Township, Michigan: a township in the lower peninsula of Michigan
• 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 in the US Navy
• The Onondagas, nickname of the 122nd New York Volunteer Infantry regiment in the American Civil War