William Williams FRSE PRCVS (1832–1900) was a Welsh veterinary surgeon who served as principal of the Dick Veterinary College in Edinburgh (1867–73) and as president of the Royal College of Veterinary Surgeons (1879). He was the founder and principal of the rival New Veterinary College (1873–1904), originally housed in Gayfield House, Edinburgh. He wrote several standard works on veterinary science.