U.S. Geological Survey (USGS) scientists conducted field work efforts during February 15-23, 2017 and April 10-25, 2019 in the mangrove forests of Pohnpei, Federated States of Micronesia (FSM) with logistical assistance from the Micronesia Conservation Trust (MCT) and field assistance from the Conservation Society of Pohnpei and the Pohnpei Department of Forestry. The field team combined the surveying technologies and techniques of Real-Time Kinematic (RTK) Global Navigation Satellite System (GNSS) surveying, total station surveying, and differential leveling to measure elevations on critical features in the mangrove forests, including the elevations of water level recorders, sediment coring locations, and Surface Elevation Tables (SETs), as well as the elevations of the landward and seaward extents of the mangroves. During the first field work effort in 2017, the field team visited sites at Dolopwail, Enipein, and Sapwalap. During the second field work effort in 2019, the field team collected elevation data at six sites plus the Pohnpei Tide Gauge. These sites included Alohkapw, Enipein, Enipoas, Palikir, Puwdoi, and Sapwalap.