William Fitzwilliam, 3rd Earl Fitzwilliam (1748-1833), was a prominent British nobleman and politician. He inherited the title of Earl Fitzwilliam in 1816 and was known for his significant contributions to the Whig Party. Fitzwilliam served as a Member of Parliament and held various political positions, advocating for reform and social justice during his lifetime. Fitzwilliam was also a notable landowner, managing vast estates in Yorkshire and Ireland. He was recognized for his philanthropic efforts, particularly in education and agriculture, and played a key role in the development of local communities. His legacy includes a commitment to improving the lives of those around him.