As a member of the
Sweden under-19 team, Nilsson played in three matches at the
2006 UEFA Women's Under-19 Championship in Switzerland. She made her senior debut in July 2009, as a 55th-minute
substitute for
Anna Paulson in a 2–0
friendly win over
China at
Stadsparksvallen,
Jönköping. She almost marked her debut with a goal, but her shot hit the
crossbar. National
coach Thomas Dennerby selected Nilsson for
UEFA Women's Euro 2009, where she appeared in three matches. She retained her squad place for the
2011 FIFA Women's World Cup in Germany, but
Annica Svensson was installed as the first-choice right-back. Nilsson did not feature until the quarter-final, where she was a late substitute in Sweden's 3–1 win over
Australia. Sweden's third-place finish at the World Cup ensured qualification for the
2012 London Olympics. Nilsson started two of
Sweden's
Group F games and was a substitute in the other one. Her two
yellow cards meant she was suspended for the quarter-final and Annica Svensson played in the 2–1 defeat by
France at
Hampden Park in
Glasgow. Incoming national coach
Pia Sundhage retained Nilsson and selected her in the squad for
UEFA Women's Euro 2013, which Sweden hosted. After recovering from a foot injury, Nilsson played in two of Sweden's three
Group A matches. Sundhage selected youngster
Jessica Samuelsson at right-back for the knockout matches against
Iceland and
Germany. In April 2014, Nilsson scored her first international goal, on the occasion of her 50th cap. It came in Sweden's 4–0
World Cup qualifying win over
Northern Ireland at
Shamrock Park in
Portadown. She added further goals in the return match with Northern Ireland and against
Bosnia and Herzegovina. Ahead of the
2015 FIFA Women's World Cup, Sundhage experimented with Nilsson in an unfamiliar left-back role. The move was designed to accommodate converted forward
Elin Rubensson at right-back. Nilsson adapted quickly to her new role, although her momentary "blackout" cost the team a goal in a 2–1 pre-tournament friendly defeat by the
Netherlands. Nilsson started Sweden's opening World Cup match at left-back, but struggled to contain
Nigeria's
winger Asisat Oshoala. Sweden surrendered a two-goal lead to draw 3–3. In Sweden's next match an improved performance secured a 0–0 draw with the
United States, with Nilsson pushed into a left-sided
midfield role. In Sweden's 4–1 defeat by Germany in the second round, Nilsson replaced beleaguered left-back Samuelsson at half-time.
International goals :''Scores and results list Sweden's goal tally first.'' ==Playing style==