Does anyone know what actual town its was where they filmed the scene
of the characters Grady and James visiting Grady's wife's parent's
home. In the movie it was referred to as Kinship.

Thanks

Hello.

The town is Beaver, Pennsylvania.  Specifically, Grady's wife's
parents' home is on Wayne Street in Beaver.

From the Pittsburg Post-Gazette, "On Location: Where they shot,"
Friday, February 25, 2000:

"...Home of Grady's in-laws - Wayne Street, Beaver."
http://www.post-gazette.com/magazine/20000225Boylocation8.asp
(Click on the link for a detailed list of other shooting locations)

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search terms:
"wonder boys" pittsburgh locations carnegie beaver

I hope this helps.

Thanks for the quick response; accurate & sourced.