In a sentence, place a comma between a city and a state.
I live in Chicago, Illinois.
My friend traveled to Denver, Colorado.
If the sentence continues after the city and state, also put a comma after the state.
We visited Charleston, North Carolina, at the end of May.
Take a trip to Boston, Massachusetts, if you want to learn about American history. ▶
It is also proper to place a comma between a city and a country.
Jim went to Cairo, Egypt, for business last month.
Joel watched the World Cup in Frankfurt, Germany.
Use a comma between a city and a state and between a city and a country.
▶It’s your turn. Place a comma in the appropriate spot. We watched a professional soccer game in Madrid Spain. Did you separate the city and country with a comma? Good for you!