- Handbook of Texas Online: Martindale - Community history and information.
- Humphreys Cemetery Association - List of burials and other information about this cemetery, active since 1854.
- Martindale Local News: Topix - Local, regional, and statewide news collected from diverse sources on the web.
- Martindale Triathlon - Includes course description, past results, and divisions.
- T G Canoe Livery - Canoe and kayak rentals, San Marcos River shuttles, sales of equipment and accessories, and repairs. Includes photos and descriptions of boats for sale.
- Weather Underground: Martindale, Texas - Local forecast and current conditions.
