Odo II () (983 – 15 November 1037) was the Count of Blois, Chartres, Châteaudun, Beauvais and Tours from 1004 and Count of Troyes (as Odo IV) and Meaux (as Odo I) from 1022. He twice tried to make himself a king: first in Italy after 1024 and then in Burgundy after 1032. Odo II was the son of Odo I of Blois and Bertha of Burgundy. He was the first to unite Blois and Champagne under one authority although his career was spent in endless feudal warfare with his neighbors and suzerains, many of whose territories he tried to annex.