Lois Toulson (born 26 September 1999) is a British diver. A specialist in the 10 metre platform, she won the gold medal at the inaugural European Games in 2015, and the senior European title in 2017. She competed in the women's synchronized ten metre platform event at the 2016 Summer Olympics with Tonia Couch. She won silver in mixed 10m platform synchro at the 2017 World Aquatics Championships with Matty Lee, and gold in the women's synchronized 10 metre platform at the 2018 European Aquatics Championships with Eden Cheng.