Murphy has represented the United States at both the youth and senior national team levels.
Junior Murphy represented the United States at the
2018,
2019, and
2020 IIHF World Women's U18 Championships, scoring a total of 13 points in 15 games and winning gold twice and silver once. At the 2020 event, she became the second player in history to score a goal in three consecutive
World U18 Championship gold medal games, after
Kendall Coyne Schofield.
Senior World Championships Murphy made her senior debut for the United States at the
2021 IIHF Women's World Championship, earning a silver medal. The goal broke the previous record of 13 seconds set in 1994. After
Abby Roque won the opening faceoff, Murphy sped past two Swiss defenders and fired a shot past goaltender Saskia Maurer. At the
2024 IIHF Women's World Championship in
Utica, New York, Murphy recorded three goals and five assists for eight points over seven games as the United States earned the silver medal. She scored a goal and added an assist in a 5–3 victory over
Finland in group play on April 6. In the quarterfinals on April 11, Murphy scored two goals in a 10–0 victory over
Japan. Murphy helped the United States win the gold medal at the
2025 IIHF Women's World Championship in
České Budějovice,
Czech Republic, defeating defending champion Canada 4–3 in overtime (the longest overtime game in tournament history). On April 11, 2025, Murphy scored two goals in the United States' 4–0 victory over host
Czechia before a sellout crowd of 5,859 at Budvar Arena. Murphy opened the scoring with a power-play one-timer from the left circle with 5:02 remaining in the first period, and added her second goal at 6:58 of the second period by collecting her own rebound. The tournament set an all-time attendance record with 122,331 fans over 12 days. At age 19, she was the youngest forward on the U.S. team. Murphy recorded one assist in seven games as the United States won the silver medal. On January 2, 2026, Murphy was named to Team USA's roster to compete at the
2026 Winter Olympics. On February 10, Abbey Murphy had three assists in a 5-0 win versus Canada, marking the first time that Canada have been shutout in women's ice hockey at the Olympic Games.
Rivalry Series Murphy competed in the 2025–26
Rivalry Series against Canada in November and December 2025, recording five goals and eight points across four games as the United States swept the series 4–0. On November 6, 2025, she scored a
hat trick in a 4–1 victory in Cleveland, with all three goals assisted by
Taylor Heise. It was the first hat trick by an American against Canada since
Hilary Knight in the 2023 World Championship gold medal game. On December 11, 2025, Murphy recorded two goals in a 10–4 victory over Canada in Edmonton, Alberta, marking the first time the
Canadian women's national ice hockey team allowed 10 goals in a loss to the United States. == Career statistics ==