Conjola National Park is home to 18 distinct plant communities including 4 that are endangered due to urban development on the East coast of Australia.

The national park is listed as being a biodiversity hotspot containing 429 species although this number is likely to rise due to further surveying of the area.

A further 8 significant species occur in the park, along with Grevillea macleayana and Pultenaea villifera which are on the national register of rare or threatened Australian plants.

Eastern grey kangaroos and echidnas are common, but the favourite resident of park visitors is the noisy yellow-tailed black cockatoo (Zanda funerea).

[2] The underlying geology of the park is mainly composed of the Permian Conjola formation, a series of sandstone and shale units.