The Phase 1 DBA component of the Rapid Coastal Zone Assessment Survey for the Inner Humber Estuary, forming part of Historic England's national programme designed to enhance and update Historic Environment Records in coastal areas. The DBA was carried out in 2019 and 2020 by Cornwall Archaeological Unit and COARS, University of Southampton. The aims of the project were to enhance the Humber, North Lincolnshire and North East Lincolnshire HERs; to inform future coastal, shoreline and flooding management; to provide an overview of coastal change from the Palaeolithic onwards; and to provide a broad assessment of the likely archaeological potential and vulnerability of the resource. The survey area covers 247 sq km; from the lowermost limits of the Rivers Ouse and Trent following the River Humber eastwards to the Patrington Channel on the north bank of the estuary and on the southern bank, to the parish boundary between Great Coates and Grimsby. Overall, the project added, updated or amended 685 records. The new records created totalled 558 for Humber, 100 for North Lincolnshire and 15 for North East Lincolnshire. Research priorities and themes identified by the DBA are presented in the context of the regional themes and research aims set out in the Yorkshire and East Midlands research agendas. Specific sites, areas and themes which could benefit from further research or work have been identified, and a number of sites suggested that could be considered for designation assessment.