Trilby is a census-designated place (CDP) in the northeast corner of Pasco County, Florida, United States.

He has been quoted as saying he wished to name it "after the heroine of a story which has lately deeply moved me", referring to George du Maurier's novel of the same name.

[7] Because of the loss of its railroad industry, it has declined into a residential community for Dade City, and also for the Tampa Bay region.

According to the United States Census Bureau, the CDP has an area of 1.0 square mile (2.6 km2), all land.

In addition, Pasco County Road 575 passes through the center of town on a roughly east–west itinerary, and continues east toward adjacent Trilacoochee, followed by Lacoochee.