A key step in improving patient safety involves measurement of the culture of safety at the hospital and unit level, using validated surveys such as the Agency for Healthcare Research and Quality's (AHRQ) Hospital Survey on Patient Safety Culture. This report presents baseline survey data from nearly 400 hospitals, classified by hospital characteristics (eg, teaching status, bed size) and respondent characteristics (eg, hospital work area and staff position). Hospitals may use these data as benchmarks in order to better evaluate their own survey results.