Idaho.
Idaho is the name of a US state, not a capital. Its capital is Boise.
Only one, Boise, Idaho. There is also, however, a 'Boise City' in Oklahoma.
It was Lewiston at first, but disputes over where the capital should be resulted in it being moved to Boise. Boise was growing in size and closer to the center of the state. Lewiston was too far north. It can be argued that Boise is now too far southwest, but there aren't big enough cities near the true center of the state to make one capital. Plus, many capitals aren't in the center of their states anyway.
Boise is the capital and most populous city in the U.S. state of Idaho.
Boise is the capital and most populous city in the U.S. state of Idaho.
Boise is the capital city of Idaho. It has a population of 212,303 and is the most populous city in the state.
Boise is the capital and most populous city of Idaho.
Idaho
Boise is the capital of the state of Idaho. It is growing in size but is still fairly small. It is a city.
Idaho is a U.S. state. Idaho City is a city in Boise County, Idaho.
No city in the U.S. is a state. Cities are separate from states, like Tampa Bay and Boise.