Cities, Counties, Boundaries

There is a discussion on the unique city thread that got into the cities that had consolidated boundaries with their counties.

That got me thinking.

Are there any major US cities located in more than one county?

Of course NYC fits the fill (5 boroughs are each their own county). But elsewhere? Here in Chicago, a part of O'Hare crosses into DuPage County, but it is virtually inconsequential; Chicago is virtually entirely in Cook Co. We do have suburbs that cross county lines. One northwest of the city (Barrington Hills) I believe has parts in four counties while the major west suburban city of Aurora crosses into DuPage County (far more extensively than Chicago does)

Can you think of any place else where cities cross county lines?>