Lucas Ihlein (born 1975) is an artist and academic whose practice spans protest art, squatting, artist collectives, and collaborations with major institutions. He studied Fine Arts in Perth and now lectures at the University of Wollongong. A recipient of numerous awards, including an Australia Council Fellowship, Ihlein documents his projects through blogs, installations, performance, video, prints, and drawings.

In recent years, Ihlein has focused on socially engaged art, agriculture, and ecological management, blending multiple artforms to explore these themes. His collaborative projects with Kim Williams, such as Sugar vs the Reef?, involve artists, farmers, and communities. Both are part of KSCA (Kandos School of Cultural Adaptation), a group supporting interdisciplinary creative practice.