title: William Halliday
text: # William Halliday
  
  William Halliday may refer to:
  
  * William Halliday (politician) (1828–1892), Australian politician
  * William Reginald Halliday (1886–1966), English historian
  * William P. Halliday (1827–1899), American steamboat captain, banker and businessman
  