Amphibians and Reptiles in Harrison County: Texas Cooperative Wildlife Collection list of species found in the county.
Birds of Caddo Lake: Includes a list of area birds, bird-finding guide, bird-banding reports, and other resources for birders visiting the area.
Caddo Defense Organization: Community-based wetland conservation and management group. Includes news, a calendar of events, and donation information.
Caddo Lake Area Chamber of Commerce and Tourism: Includes area attractions, business directory, lodging, and restaurants.
Handbook of Texas Online: Current and historical information about Harrison County.
Harrison Central Appraisal District: Interactive site which allows searches of property tax records.
Harrison County: Site provides links and information to the county offices and services.
Sherman and Sherman Orthodontics: Orthodontists treating children and adults using traditional and clear braces. Locations in Longview and Marshall.
The Political Graveyard: Harrison County: Lists politicians who lived or died in the county.
YB Lost - Harrison County, Texas: Provides names and addresses of county public officials and departments.