Placid Hills is a mixed-use locality on the western outskirts of the town of Gatton in the Lockyer Valley Region, Queensland, Australia.

[3][4] The Gatton Clifton Road (State Route 80) passes to the south of the locality (Lower Tenthill), then becomes part of the south-western boundary of the locality, and exits to the west (Grantham).

[4] The Western railway line forms the northern and north-western boundaries of the locality, entering from the north-east (Gatton) and exiting to the west (Grantham).

[4] The locality was officially named and bounded by the Minister for Natural Resources on 18 February 2000.

The nearest government primary schools are Grantham State School in neighbouring Grantham to the west and Tenthill Lower State School in neighbouring Lower Tenthill to the south.