- 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 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.
