The National Transportation Safety Board's (NTSB) Review of US Civil Aviation Accidents, Calendar Year 2011 covers accidents involving aircraft operated under Title 14 Code of Federal Regulations Parts 121 and 135 as well as accidents involving general aviation aircraft operated under Part 91. In total, 1,553 accidents occurred in 2011, involving 1,574 US-registered aircraft. Approximately 18 percent (282) of these accidents were fatal, resulting in 489 fatalities. General aviation accidents accounted for 95 percent of total accidents and 94 percent of fatal accidents in 2011. Data for the years 2002-2010 are also included to provide historical context for the 2011 statistics. The details of the circumstances of the accidents are presented throughout this report. Readers may download a copy of the accident dataset at http: //www.ntsb.gov/data/aviation stats.html