Greenwood has represented the England under-17 team making six appearances in 2017–18 and was part of the squad in the Algarve Tournament in Portugal.
On 30 August 2019, Greenwood was included in the England under-21 squad for the first time and made his debut as a 59th-minute substitute during the 3–2 win against Turkey on 6 September 2019 in qualifying for the 2021 European Under-21 Championship. On 19 November 2019, Greenwood scored his first goal for the U21s; equalising against The Netherlands in a match which England ultimately lost 2–1.
