It is rare in most states, I believe. It is very common in South Carolina (see https://en.wikipedia.org/wiki/List_of_counties_in_South_Carolina https://en.wiki

It is rare in most states, I believe. It is very common in South Carolina (see https://en.wikipedia.org/wiki/List_of_counties_in_South_Carolina https://en.wikipedia.org/wiki/List_of_counties_in_South_Caro...), which has counties named things like "Greenville" and "Spartanburg" after their largest cities - it feels to me like those should be "Green" and "Spartan". And then there are states like Georgia where there are counties, and cities with the same name that are in different counties, because the county-namers and the city-namers were pulling their names from the same pool of well-known people but weren't talking to each other. Also, in California: San Luis Obispo, Riverside, Sacramento, Fresno, Santa Barbara.