The Thames Lido, formerly known as the King's Meadow swimming pool, is an open-air swimming pool or lido located in King's Meadow in Reading, Berkshire. It was first opened to the public in 1903 as the Ladies Swimming Bath and is believed to be the oldest surviving outdoor municipal pool of a similar early Edwardian era. In August 2004, as a result of a campaign, the building was awarded Grade II listed building status. It re-opened in 2017 after three years of restoration.