Shannon Liss-Riordan (née Liss; born 1969) is an American labor attorney. She is best known for her class-action cases against companies such as Uber, FedEx, and Starbucks. Liss-Riordan was a candidate in the 2020 United States Senate election in Massachusetts, running in the Democratic primary for a seat currently held by Senator Ed Markey. Liss-Riordan also unsuccessfully ran for the Democratic nomination for Massachusetts attorney general in the 2022 Massachusetts Attorney General election.