O'Neill

The taxon authority O'Neill may refer to:

• Eric M. O'Neill (fl. 2004), U.S. herpetologist
• Hugh Thomas O'Neill (1894–1969; O'Neill), U.S. botanist
• John Patton O’Neill (fl. 1964–), U.S. ornithologist
• Joseph C. O'Neill (fl. 2016), U.S. acarologist
• Kevin O'Neill (fl. 2019), U.S. entomologist
• Mark Bryan O’Neill (fl. 2003), U.S. mammalogist

• Neill