Kennelly is a surname. Notable people with the surname include:
Ardyth Kennelly, American novelistArthur Edwin Kennelly, American engineerBarbara B. Kennelly, Connecticut RepresentativeBrendan Kennelly, Irish poet and novelistKeala Kennelly, American surferMartin H. Kennelly, mayor of ChicagoMatthew F. Kennelly, Federal District Court Judge in IllinoisPat Kennelly, Australian politicianRyan Kennelly, American powerlifterSheila Kennelly, Australian actressTadhg Kennelly, Irish Gaelic football playerTim Kennelly, Irish Gaelic football player