The Hampton-Seabrook Estuary (HSE) is a vital coastal habitat in New Hampshire, but its preservation is hindered by highly fragmented and unclear ownership of over 1,200 salt marsh parcels. This complex situation, rooted in historical informal land surveys, makes it challenging for municipalities and conservation groups to implement effective protection strategies. This document offers historical context, clarifies land ownership complexities, and provides tools for prioritizing conservation actions to ensure the HSE’s long-term ecological resilience and community benefits.