Amanda Blackhorse (born February 1, 1982) is a citizen of the Navajo Nation, a social worker, a journalist, and a prominent Native American activist. She gained national attention as the lead plaintiff in the landmark trademark lawsuit Blackhorse v. Pro-Football, Inc., which was filed in 2006 and sought to cancel the Washington NFL team's trademark registrations on the grounds that the name 'Redskins' and its associated imagery were disparaging to Native Americans. Her advocacy was a significant part of the broader movement that contributed to the team's decision to retire the name and logo in 2020 and subsequently rebrand as the Washington Commanders in 2022. A graduate of Arizona State University with a Master of Social Work, Blackhorse has worked extensively as a psychiatric social worker, particularly within the Navajo Nation's Department of Behavioral Health Services. Her activism spans Indigenous rights, with a focus on cultural preservation, tribal sovereignty, environmental justice (notably opposing uranium mining and resource extraction on tribal lands), media representation, education, and addressing health disparities within Native communities. She has also contributed writing to outlets like The Navajo Times and Indian Country Today. She continues to reside and work in the Southwestern United States, leveraging her platform to influence policy and public opinion.