Lily K. Donaldson (born 1999) is an American beauty pageant titleholder who won Miss United States 2022.

[9][10] As of 2023, Donaldson is a Ph.D. candidate at Rensselaer Polytechnic Institute studying controlled environment agriculture[6][11] within a School of Architecture Built Ecologies program.

[7] In 2023, Donaldson led an event with NASA where students at Brighton Elementary School in Tipton County, Tennessee asked questions of astronauts onboard the International Space Station.

[22][23][24] In 2024, Donaldson gave a keynote on the importance of STEM education at the AI Expo for National Competitiveness in Washington, DC.

[6] On October 16, 2022, Donaldson was crowned Miss United States at the Cannon Center for the Performing Arts in Memphis, Tennessee.

[6] At Miss United States 2021, while representing Tennessee, Donaldson was second runner-up and received the People's Choice award.