Central Susquehanna Valley Chamber of Commerce: Includes member directory, information on services and resources, news, calendar of events, information on the area and memberships.
Pennsylvania State Parks - Valleys of the Susquehanna: Park listings for Williamsport, State College and the surrounding area.
Pennsylvania Visitors Network - Valleys of the Susquehanna: Directory listing real estate, state parks, calendar of events and visitor information.
Susquehanna Valley Visitors Bureau: Official tourist promotion agency for central Pennsylvania's Susquehanna Valley, serving Northumberland, Snyder and Union counties. Includes information on lodging, restaurants, and area attractions.