Ada and Ethel was a wooden schooner that was wrecked 10 miles (16 km) southeast of Seal Rocks, New South Wales, Australia, on 26 October 1887.

The vessel was named after Ada and her infant sister Ethel May, who died approximately 12 months later.

Ada and Ethel left port on the afternoon of 26 October 1887 under the command of Captain Frederick.

They soon found that the ship was taking on water so rapidly that by 19:30 the vessel became unmanageable, and Captain Frederick endeavoured to make for Port Stephens, New South Wales, where he intended to beach her.

However, it was soon apparent that Ada and Ethel would not reach the shore, and Captain Frederick and the five members of his crew abandoned ship off Seal Rocks, New South Wales.