Ertz joined the national team for their first training camp of the year at the U.S. Soccer National Training Center in Carson, California from January 5 to 21.
She was then named to the 20-player roster for 2016 CONCACAF Women's Olympic Qualifying tournament.
The United States qualified to the 2016 Olympic Games in Rio de Janeiro after a semi-final win against Trinidad and Tobago on February 19.
The United States won the tournament after defeating Canada 2–0 on February 21.

Ertz was named to the roster for the 2016 SheBelieves Cup that took place from March 3 to 9.
She came in for Alex Morgan in the 80th minute of the team's opening match of the tournament on March 3 against England.
She also made appearances in other two matches of the tournament, helping the United States win the 2016 SheBelieves Cup with a 2–1 win over Germany in their final game.

Ertz joined a 23-player roster for a training camp ahead of two matches against Colombia in early April.
In the second match on April 10, Ertz played all 90 minutes and scored two goals to help the United States defeat Colombia 3–0.
Ertz was on the roster for another two-game series against Japan in early June.
She started in both games and scored a goal in the 27th minute of the second match on June 5.

On July 12, Ertz was named to the 18-player team that would represent the United States at the 2016 Olympic Games in Rio de Janeiro.
She made her Olympic debut on August 3 in the team's opening match against New Zealand, a 2–0 victory.
She did not appear in the team's remaining two group matches due to a sore groin.
She returned for the team's quarterfinal match against Sweden where she played the full game, which the U.S. would go on to lose in penalty kicks.
Ertz joined the national team for their first training camp of the year at the U.S. Soccer National Training Center in Carson, California from January 5 to 21. She was then named to the 20-player roster for 2016 CONCACAF Women's Olympic Qualifying tournament. The United States qualified to the 2016 Olympic Games in Rio de Janeiro after a semi-final win against Trinidad and Tobago on February 19. The United States won the tournament after defeating Canada 2–0 on February 21.
Ertz was named to the roster for the 2016 SheBelieves Cup that took place from March 3 to 9. She came in for Alex Morgan in the 80th minute of the team's opening match of the tournament on March 3 against England. She also made appearances in other two matches of the tournament, helping the United States win the 2016 SheBelieves Cup with a 2–1 win over Germany in their final game.
Ertz joined a 23-player roster for a training camp ahead of two matches against Colombia in early April. In the second match on April 10, Ertz played all 90 minutes and scored two goals to help the United States defeat Colombia 3–0. Ertz was on the roster for another two-game series against Japan in early June. She started in both games and scored a goal in the 27th minute of the second match on June 5.
On July 12, Ertz was named to the 18-player team that would represent the United States at the 2016 Olympic Games in Rio de Janeiro. She made her Olympic debut on August 3 in the team's opening match against New Zealand, a 2–0 victory. She did not appear in the team's remaining two group matches due to a sore groin. She returned for the team's quarterfinal match against Sweden where she played the full game, which the U.S. would go on to lose in penalty kicks.
Julie Ertz