||The objective of this research was to determine recreation capacity at Khao Leam Ya – Mu Ko Samed National Park (LY-KS NP). The study investigated the existing capacity of recreation resources by analyzing four capacity types: ecological (ECC), physical (PCC), facility (FCC), and social (SCC). This paper presented the findings on 3 main islands: Ko Samed, Ko Kudee, Ko Talu, and some snorkeling sites. The results found the ECC, PCC, and FCC exceeded at Ko Samed. At Ko Kudee, found the exceeded PCC while at Ko Talu found the exceeded PCC and FCC. One snorkeling site found FCC exceeded. The maximum carrying capacity at Ko Samed and Ko Kodee was 4,100 and 168 people per night respectively. Most ecological carrying capacities, however, have not yet determined since long term monitoring is needed.