The Cooloolabin Dam is a concrete gravity dam on Rocky Creek located to the west of Yandina on the Sunshine Coast of Queensland, Australia. The dam is located on the headwaters of the South Maroochy River waterway and is a source of potable water for the area.
The main dam wall is high and long, and it has five saddle dams that total in length. The dam was completed in 1979 and it created a reservoir with a capacity of . As part of the SEQ Water Dam Improvement Program, a section of the spillway was cut away in 2015 to lower the spillway by , reducing the full supply capacity to .
The spillway is un-gated and uncontrolled and when the reservoir reaches 100 per cent capacity, water flows over the spillway and safely out of the dam. The reservoir overflowed for the first time in 1988.