The US capital city is Washington D.C. It is in no state. It is in the District of Columbia (This is what the letters, D.C., stand for), an area specifically established, to be outside the boundaries of any state, for the national capital.
Oklahoma City is the capital of the US State of Oklahoma.
Baltimore is not the capital city of any state. Baltimore is the largest city in Maryland but Annapolis is the Capital City
Atlanta is the capital city of the US state of Georgia.
Kansas City is not the capital of any state in the US. Topeka is the capital of Kansas and Jefferson City is the capital of Missouri.
Salt Lake City is the capital city in the U.S. state of Utah.
Tallahassee is the capital city in Florida.
Jackson is the capital city in Mississippi.
Frankfort is the capital city of the US state of Kentucky.
Montpelier is the capital city in the U.S. state of Vermont.
Idaho is the name of a US state, not a capital. Its capital is Boise.
Phoenix is the capital city of the US state of Arizona.
The city is Nashville.