Biggest Duplicates

I've seen nationwide weather listings where major cities are listed without state names. For example, if they say Las Vegas, you know they don't mean New Mexico. But there are separate listings for Portland, Oregon and Portland, Maine.

That made me wonder: if you listed the most populous cities from biggest to smallest, would Portland be the first duplicate you would encounter? Right away I realized it would not be, and with a little brainstorming I came up with six names that would rank higher. Some research revealed even more.

Try thinking what might be in the list of large cities with duplicate names. Then proceed with this little quiz: