Water-resources data for the 2005 water year for New Hampshire and Vermont consists of stage, discharge, and water quality of streams; contents of lakes and reservoirs; and ground-water levels. This report contains discharge records for 78 gaging stations, stage records for 5 lakes, monthend contents for 2 lakes and reservoirs, water levels for 37 observation wells. Also included are data for 37 crest-stage partial-record stations. Additional water data were collected at various sites, which are not part of the systematic data-collection program and are published as miscellaneous measurements for gaging stations in New Hampshire and Vermont. These data represent that portion of the National Water Data System operated by the U.S. Geological Survey and cooperating State and Federal agencies in New Hampshire and Vermont.