Season Episodes Originally aired Nielsen ratings First aired Last aired Rank Viewers (millions) 13 March 19, 2014 (2014 - 03 - 19) June 11, 2014 (2014 - 06 - 11) 150 2.59 16 October 22, 2014 (2014 - 10 - 22) March 11, 2015 (2015 - 03 - 11) 157 2.46 16 January 21, 2016 (2016 - 01 - 21) May 19, 2016 (2016 - 05 - 19) 165 1.94 13 February 1, 2017 (2017 - 02 - 01) May 24, 2017 (2017 - 05 - 24) 158 1.47 5 13 April 24, 2018 (2018 - 04 - 24) August 7, 2018 (2018 - 08 - 07) 182 1.61
when did the 100 season 3 come out
January 21, 2016