Justicia cooleyi is a rare species of flowering plant in the acanthus family known by the common name Cooley's water-willow. It is endemic to Florida in the United States, where it occurs in three counties. It is a federally listed endangered species. This plant can be found on the Brooksville Ridge of Florida in Hernando and Sumter Counties. It is also reported from Lake County. Its exact abundance is not known because of the lack of recent comprehensive surveys. In 2000 there were seventeen occurrences.