Adrian is an unincorporated community in Rock Creek Township, Hancock County, Illinois, United States. Adrian no longer has a post office and is now served by Dallas City. It hosts a grain elevator, Chem Gro, and several houses. A former Disciples of Christ Church stands at the west end of the community. The former one-room school at the east end of the community is now a farm machine shed.

Adrian was laid out in the 1870s, taking its name from Adrian, Michigan. A post office was in operation in Adrian from 1870 until 1992.