This report documents an assessment carried out in 2011/2012 to identify potential groundwater aquifers in Somaliland and Puntland. The report gives details of the data collection and analysis including:- desk studies; geological and geophysical field surveys; and remote sensing data analysis, as well as various products generated from the survey / assessment. The products of the hydrogeology survey include among others: hydrogeology and water quality maps of Somaliland and Puntland at a scale of 1:750,000; Hydrogeology maps for 4 selected areas of interest at a scale of 1:250,000; main report of the assessment and 4 appendices giving details of the field work, geophysics, remote sensing and databases. The report is expected to be used by different stake holders in the water sector, mainly the water authorities in Somaliland and Puntland for development and management of groundwater resources in the region