Mangrove inventory data from J.N. Ding Darling National Wildlife Refuge, Sanibel Island, Florida collected in 2016 and 2017. Plot data includes downed woody debris count, mangrove species information and site descriptions. Avicennia germinans (Black mangroves), Laguncularia racemosa (White mangroves) and Rhizophora mangle (Red mangroves) were inventoried for diameter at breast height (DBH), height, and dead status