William Lowndes was an American politician and a member of the U.S. House of Representatives from South Carolina. He served from 1823 until his death in 1828 and was known for his strong support of the Democratic Party and his advocacy for states' rights. Lowndes was also a prominent figure in the early 19th century, contributing to discussions on economic policy and national infrastructure. He played a significant role in the development of the Bank of the United States and was involved in various legislative efforts aimed at improving the nation's financial system.