HMS Rainbow was a frigate of the Royal Navy, built in 1823.
[1][2] It was commanded by Henry John Rous from 1825 to 1829.
From 1825 to 1827 it served under the Commander-in-Chief, East Indies.
In February 1827 it arrived in Sydney in the colony of New South Wales where it was used to conduct a number of explorations of the (now) Queensland and New South Wales coasts.
[2] The Rainbow Reach of the Macleay River in New South Wales was named after the ship and the locality Rainbow Reach in the Kempsey Shire was named after the reach.