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.
- http://www.visitcentralpa.org/

Central Susquehanna Valley Chamber of Commerce
- Includes member directory, information on services and resources, news, calendar of events, information on the area and memberships.
- http://www.csvcc.chamberinfo.org/chambermission.htm

Pennsylvania Visitors Network - Valleys of the Susquehanna
- Directory listing real estate, state parks, calendar of events and visitor information.
- http://www.pavisnet.com/susquehannavalley/