Magnus Sheffield (born April 19, 2002) is an American cyclist who rides for UCI WorldTeam Ineos Grenadiers.
Magnus Sheffield left Rally Cycling in August 2021 for unknown reasons ahead of his 2022 season with Ineos.
In April 2022 Sheffield won Brabantse Pijl, one of the Flanders Classics races. He finished +0:37 ahead of French riders Warren Barguil and Benoît Cosnefroy becoming the first American to win this race and the first American to win any one of these classics since Tyler Farrar over a decade earlier.