Hilary Knight, who graduated from Wallingford's Choate Rosemary Hall, scored 53 seconds into the game and then assisted on Alex Carpenter’s second-period goal. USA's Kelli Stack scored the third goal.
Team USA also includes four-time Olympian Julie Chu of Fairfield.
The United States plays Switzerland on Monday for a chance to clinch a spot in the semifinals.
In its opener, Canada topped Switzerland, 5-0, in the other opener for Group A. Canada will take on Finland on Monday.
The North American teams -- the favorites for gold -- will meet up in the round-robin tournament on Feb. 12. Two teams from Group A will move to the medal round.
The women's hockey schedule and results can be found here at the official Sochi 2014 website.
Click here to follow Daily Voice Norwalk and receive free news updates.