Rallus elegans (King Rail) is a secretive marsh bird that has experienced substantial population decline due to habitat loss, especially in the northern portion of its range. Life-history characteristics in this region are largely undescribed for King Rails. We summarized morphometric measurements for 14 King Rails that we caught and radio-tracked in western Lake Erie coastal marshes between 2019 and 2021. We opportunistically noted behaviors and events that could, if supported by similar data from elsewhere in the region, inform conservation efforts and advance general understanding of this species. We described habitat at 2 nest sites, monitored nest success, noted adult behaviors at the nest and in the vicinity of chicks, described 3 mortality events, and documented 5 long-distance movements during the breeding season. We also present estimates of fall-departure dates from our study area.