The National Estuarine Research Reserve System has developed a consistent protocol for monitoring vegetation across the nations estuaries. Eventually, the goal is to be monitoring vegetation regularly at every Reserve, allowing for robust spatial and temporal analyses of estuarine vegetation trends. To date, 18 Reserves have implemented this vegetation monitoring protocol. The vegetation community that is assessed varies by reserve. The protocol has been implemented for submerged aquatic vegetation such as eelgrass and algae, as well as for emergent vegetation such as salt marshes and mangroves. The vegetation monitoring protocol involves permanent sampling plots along fixed transects. Parameters monitored include percent cover of all plant species, as well as stem density and canopy height of the common species. Elevation is also assessed for each plot when feasible. The complete monitoring protocol provides more details. These data will be valuable for tracking changes in abundance of particular species of interest, or in species composition over time. For instance, the transects can be used to detect landward migration of vegetation communities in the face of projected sea level rise. The National Estuarine Research Reserves is a network of 30 reserves protected for long-term research, ecosystem monitoring, education, and coastal stewardship. Established by the Coastal Zone Management Act, the reserve system is a partnership program between NOAA and the coastal states. NOAA provides funding, national guidance, and technical assistance. Each reserve is managed on daily basis by a lead state agency or university with input from local partners. These data are collected as part of the NERRS System-Wide Monitoring Program (SWMP), which includes (1) abiotic indicators of water quality and weather; (2) biological monitoring; and (3) watershed, habitat, and land use mapping. Data were collected under individual Reserve NOAA grant/cooperative agreements and managed by the CDMO under NOAA grant/cooperative agreement #NA22NOS4200128 (2022) and prior grants. For more information on Reserve locations and programs, please visit www.nerrsdata.org or https://coast.noaa.gov/nerrs/.