Jill Jamie Roord was born on 22 April 1997 in Oldenzaal, Netherlands. After beginning her career with Quick '20, she joined FC Twente and progressed into the senior team as a teenager. Roord quickly established herself as a prolific midfielder, winning domestic honours with Twente before moving abroad to Bayern Munich in 2017.
Roord subsequently represented Arsenal, VfL Wolfsburg and Manchester City. Her two seasons at Wolfsburg were particularly successful, with Roord winning the Frauen-Bundesliga and two DFB-Pokal titles while contributing regularly with goals from midfield. She joined Manchester City in 2023, but suffered an ACL injury during her first season. After returning to action and completing the 2024/25 campaign, she returned to FC Twente in 2025.
Roord made her senior Netherlands debut in February 2015 and became a regular member of the Dutch national team. She was part of the squad that won UEFA Women's Euro 2017 and reached the 2019 FIFA Women's World Cup final. Roord scored the Netherlands' first goal of the 2019 World Cup and was particularly productive at the 2023 tournament, scoring four goals. She reached 100 senior international appearances in October 2024.