Hobby is a surname. Notable people with the surname include:
Alfred Marmaduke Hobby (1836–1881), American merchant, politician, and poet, and Confederate States of America military officer Bertram Maurice Hobby (1905–1983), English entomologist James H. Hobby (1835–1882), United States Navy officer for whom a U.S. Navy ship was named Matt Hobby (born 1985), American actor and comedian Oveta Culp Hobby (1905–1995), American publisher, federal government official, and Women's Army Corps officer Sir Philip Hobby, an alternative spelling for Sir Philip Hoby (1505–1558), sometimes also spelled Sir Philip Hobbye, an English ambassador William M. Hobby, Jr., (1899–1942), United States Navy officer killed in action during World War II for whom a U.S. Navy ship was named William P. Hobby (1878–1964), American publisher and politician and the father of William P. Hobby, Jr. William P. Hobby, Jr. (born 1932), American publisher and politician and the son of William P. Hobby