There are no states in the US that have a city named Constantinople. The name is historically associated with the capital of the Byzantine Empire, now known as Istanbul, Turkey. While there may be places or neighborhoods with similar names, there is no officially recognized city named Constantinople in the United States.
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None.
Is 1
The question should be: How many states have cities named after them in THEIR state? (If it is worded in this manner.) Or better yet: How many states also have a city with a matching name, such as Kansas City, Kansas?
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5
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none