Essex County Cricket Club played their cricket during the 2005 season in Division Two of the County Championship and Division One of the Sunday League. They started the season 8–1 to win the Second Division Title, and were second in the Championship table at 9 May, but five matches without a win following that sent them down to fifth place at the Twenty20 break in June. They only intermittently broke into the top three after the Twenty20 break, and when they did their opponents behind them usually had a game in hand. They finished fifth, 15.5 points behind the promotion spot, and with 36 bowling points they picked up the fewest in the entire Division Two. In the National League, however, they only lost once in sixteen games – against Gloucestershire Gladiators in August – and won the League on 28 August with three games to play. In the C&G Trophy, they went out to Lancashire at the second round stage, while they finished fifth in the group stage of the Twenty20 Cup, two points off a guaranteed quarter-final spot.