HTMS Maeklong (Thai: เรือหลวงแม่กลอง) is a retired Royal Thai Navy escort vessel (classified also as a corvette or sloop) and training ship, built at the Uraga Dock in Yokosuka, Japan. Her sister ship was HTMS Tachin.

The Maeklong is preserved in concrete in Chulachomklao Fort in Phra Samut Chedi District, Samut Prakan Province, Thailand. The ship is named after a river, the Mae Klong.