Josefine Hasbo (born 20 November 2001) is a Danish professional footballer who plays as a midfielder for Boston Legacy FC of the National Women's Soccer League (NWSL) and the Danish national team. She graduated from Harvard University with a double degree in economics and psychology. While playing college soccer for the Harvard Crimson, Hasbo represented Denmark at the 2023 FIFA World Cup and 2025 UEFA Euro.

Hasbo joined Brøndby IF, one of Denmark's leading clubs, in the summer of 2018. She quickly broke into the Danish A-Liga (then known as the Gjensidige Women's League) where she emerged as one of Denmark's best young players. With Brøndby, she helped the team win the 2019 league championship and reach the Danish Cup final. Hasbo also competed in consecutive UEFA Champions League campaigns, reaching the quarterfinals in both 2019–20 and 2020–21. She was named Woman of the Match against Glasgow City in the 2019–20 quarterfinals, scored in the round of 16 against Vålerenga, and started both matches against Lyon in the 2020–21 quarterfinals. Her domestic performances earned her selection to Gjensidige's Team of the Year in 2019–20 and a nomination as a finalist for Danish Female Footballer of the Year.

Josefine Hasbo played four seasons (from 2021 to 2024) as a central midfielder for the Harvard Crimson, scoring 25 goals and providing 17 assists in 55 appearances. She ranks ninth all-time in career points, ninth in career goals, and tied for 13th in career assists, despite missing multiple games during her sophomore, junior, and senior years while participating in senior national team call-ups and tournaments for Denmark.

In her junior season in 2023, Hasbo scored a hat-trick in the Ivy League tournament final, leading Harvard to a 3–0 victory over Columbia and securing the conference title. She was named the tournament's Most Outstanding Player, was a unanimous First-Team All-Ivy League selection, and earned United Soccer Coaches First-Team All-America honors. She was also recognized as a semifinalist for the MAC Hermann Trophy.

During the summers following her sophomore and senior years, Hasbo represented Denmark at the 2023 FIFA World Cup and 2025 UEFA Euro. She was the first student in Harvard University history to represent her home country in the FIFA Women's World Cup.

In her senior year, Hasbo was one of three finalists for the Harvard 2025 Mary G. Paget Prize, an annual honor awarded to student-athletes who make the most outstanding contributions to women's athletics.

In interviews, Hasbo has described the challenge of balancing her responsibilities as a student-athlete at Harvard University with frequent travel to Europe every two to three months for training camps and matches with the Denmark women's national football team. While completing a double degree under the same academic requirements as other Harvard students, she completed much of her coursework while traveling, often studying on buses and flights. During national team camps, Hasbo has said that while teammates spent their downtime socializing, she frequently remained in the hotel to work on academic assignments. She also recalled taking a Harvard econometrics midterm examination remotely while with the Denmark national team in Iceland during UEFA Nations League matches, sitting the exam simultaneously with other students on campus, with a member of the Danish national team staff serving as the exam proctor.

After completing her studies at Harvard University in the summer of 2025, Hasbo joined Gotham FC on Jun 10, 2025, signing a multi-year contract through 2027. She made her immediate Gotham debut on 21 June 2025, coming on at the start of the second half and playing 45 minutes in a 2–1 victory over Bay FC. Hasbo recorded her first professional assist on 12 August 2025, contributing to Gotham's 2–0 win over Monterrey in the CONCACAF W Champions Cup. She scored her first Gotham goal on 17 September 2025, heading in a cross from Kayla Duran in a CONCACAF W Champions Cup match against the Vancouver Rise Academy.