Ertz started off 2015 at a 21-day training camp from January 5 to 25 at the U.S. Soccer National Training Center in Carson, California.
Following the training camp, she was named to the 24–player team that would travel on a 13-day trip to Europe for matches against France and England in mid-February.
On February 21, Ertz was named to the 25-player roster for the 2015 Algarve Cup in Portugal.
She started three matches of the tournament, including in the final against France on March 11.
During the game, Ertz scored her first international goal in the 7th minute to help the United States defeat France 2–0 to win the tournament.

On April 14, Ertz was named to the 23-player roster that would represent the United States at the 2015 FIFA Women's World Cup.
She was one of the five United States players that played every minute in all seven matches for the United States during the World Cup.
In the 59th minute of the team's semi-final match against Germany on June 30, Ertz pulled down opposition player Alexandra Popp inside the penalty box and was given a yellow card.
Celia Sasic took the subsequent penalty kick but missed the net.
The United States went on to win the match 2–0 to advance to the World Cup final.
In the final, the United States faced Japan on July 5.
In the 52nd minute, Ertz attempted to block a free kick but instead scored an own goal.
However, the United States still went on to win the match and the World Cup title.
Following the tournament, Ertz was named to the FIFA Women's World Cup All-Star Team.
She joined the national team on a Victory Tour following their World Cup win that started in Pittsburgh, Pennsylvania on August 16 and ended in New Orleans, Louisiana on December 16.
Ertz started off 2015 at a 21-day training camp from January 5 to 25 at the U.S. Soccer National Training Center in Carson, California. Following the training camp, she was named to the 24–player team that would travel on a 13-day trip to Europe for matches against France and England in mid-February. On February 21, Ertz was named to the 25-player roster for the 2015 Algarve Cup in Portugal. She started three matches of the tournament, including in the final against France on March 11. During the game, Ertz scored her first international goal in the 7th minute to help the United States defeat France 2–0 to win the tournament.
On April 14, Ertz was named to the 23-player roster that would represent the United States at the 2015 FIFA Women's World Cup. She was one of the five United States players that played every minute in all seven matches for the United States during the World Cup. In the 59th minute of the team's semi-final match against Germany on June 30, Ertz pulled down opposition player Alexandra Popp inside the penalty box and was given a yellow card. Celia Sasic took the subsequent penalty kick but missed the net. The United States went on to win the match 2–0 to advance to the World Cup final. In the final, the United States faced Japan on July 5. In the 52nd minute, Ertz attempted to block a free kick but instead scored an own goal. However, the United States still went on to win the match and the World Cup title. Following the tournament, Ertz was named to the FIFA Women's World Cup All-Star Team. She joined the national team on a Victory Tour following their World Cup win that started in Pittsburgh, Pennsylvania on August 16 and ended in New Orleans, Louisiana on December 16.
Julie Ertz