Killarney is an unincorporated community in Orange County, Florida, United States. Its ZIP code is 34740. The community is located west of Oakland, south of Lake Apopka, north of John's Lake, and east of the Lake-Orange County Line.
The main roads through Killarney are Florida State Road 50, Old Orange CR 50, and Orange County Road 438. The West Orange Trail and South Lake-Lake Minneola Scenic Trail terminate within the community. Florida's Turnpike also runs though Killarney, but has no interchanges there. The nearest interchange is with SR 50 in nearby Oakland.