Chartiers City is located near the mouth of Chartiers Creek as it enters the Ohio River between current day Crafton and McKees Rocks in Allegheny County. Back in the day it was a very busy place because people and supplies coming from Pittsburgh or from down the Ohio would come through there on their way to Washington County. If you type in Chartiers City, Allegheny County, PA in Yahoo or Google maps, you will be able to see the location. Pam Nixon Whispers From The Past Family History Research Service Westland, PA 15378-0008 Genealogy research services provided covering the southwestern Pennsylvania counties of Allegheny, Fayette, Greene, Washington and Westmoreland.