We have examined studies on zooplankton and meiobenthos, specifically focusing on the copepod species in the vicinity of Puerto Rico. Our effort has culminated in the creation of the first thorough species checklist of marine copepods for the island. Through this comprehensive review, we have identified a total of 135 species being distributed across 46 families. This compilation sheds light on the marine copepod diversity in Puerto Rico, accounting for approximately one-quarter of the species documented in the Caribbean, indicating a major knowledge gap on the marine copepod fauna of the island waters.