Hilary Knight is the sister of Remington Knight, who was a member of the United States senior national squad as a youngster. She was the youngest player for Team USA at the Four Nations Cup in November 2006, at the age of 17 years old.

She was the youngest player on the US team at the 2007 IIHF World Women’s Championship. Mark Johnson, the Wisconsin head coach, was also her head coach.

Knight was a silver medalist for the United States at the competition. She went on to play for the United States Under-22 National Team later that year.