The Gerromorpha from Costa Rica are poorly studied, except the Gerridae. Aiming to fill this gap, specimens collected across the country were examined. Lipogomphus leucostictus, Hydrometra alloiona, H. australis, H. huallagana, Microvelia albonotata, M. argentata, M. laesslei, M. mimula, M. panamensis, M. psilonota, M. pulchella, M. signata, and M. torquata are newly recorded from Costa Rica. Presences of Hebrus concinnus, Mesovelia amoena, and Platyvelia brachialis are confirmed. New provincial records are provided for Hebrus consolidus, H. spiculus, Hydrometra caraiba, Mesovelia mulsanti, Mesoveloidea williamsi, Microvelia reflexa, M. schmidti, and Stridulivelia cinctipes.