The 1890 AHAC season was the fourth season of the Amateur Hockey Association of Canada. Play was in challenges. The Montreal Hockey Club would win the final challenge of the season to win the Canadian championship for the third season in a row.
The annual meeting of the Amateur Hockey Association was held in the rooms of the MAAA in Montreal, on November 22, 1889. The main business was whether to accept Quebec or not, and whether to change the Crystals team name to the Dominions.
The season consisted of challenge games as well as numerous exhibition matches between all the teams in the AHAC. Quebec would challenge this season. The Montreal Crystals would be known as the Dominion Hockey Club of Montreal for this season.