Summit City may refer to one of the following places in the United States:

• A nickname of the city of Fort Wayne, Indiana
• The town of Summit City, California, incorporated into Shasta Lake City
• Summit City, California, former name of Meadow Lake, Nevada County, California
• Summit City School District in Union County, New Jersey
• The original name of the town now called Whitesburg, Kentucky
• Summit City, Michigan, an unincorporated community in rural Grand Traverse County.

• Oswald S. Crocket
• Oswald Sigg
• Oswald Skippings
• Oswald Smith Crocket
• Oswald spengler
• Oswald Taylor Brown
• Oswald teichmüller
• Oswald (television)
• Oswald Tesimond
• Oswald (The King of Fighters)
• Oswald the lucky Rabbit
• Oswald Tower
• Oswald Veblen prize
• Oswald Veblen Prize in Geometry
• Oswald Villard, Jr.
• Oswald Watt
• Oswald Watt Gold Medal
• Oswald Wenckebach
• Oswald West State Park
• Oswald William Moosmuller
• Oswald Wirth
• Oswald Wynd
• O Swann
• O Sweet Saint Martin's Land
• Oswegatchie people