# O'Neill (disambiguation)

The O'Neill dynasty is a lineage of Irish Gaelic origin.
O'Neill, Ó Néill, O'Neil, O'Neal, or Uí Néill may also refer to:

## People
### Surnames

* Uí Néill, for information on the Ui Neill dynasty
* O'Neill (surname), including surname origins and information
** List of people with the surname O'Neill, including O'Neal, O'Neil, and other variations
* The O'Neill Brothers, an American instrumental duo

### Noble titles

* Baron O'Neill, a title in the Peerage of the United Kingdom
* O'Neill baronets, two in the Baronetage of Ireland, and one in the Baronetage of the United Kingdom
* Viscount O'Neill, a title in the Peerage of Ireland

## Places
### Australia

* O'Neill's Adventureland, an amusement park in Edmondson Park, New South Wales

### Canada

* Archbishop M.C. O'Neill High School, Regina, Saskatchewan
* O'Neill Collegiate and Vocational Institute, Oshawa, Ontario

### United States

* O'Neal Island, San Juan Islands of Washington
* Buckey O'Neill Cabin, a cabin
* Eugene O'Neill National Historic Site, Danville, California
* Eugene O'Neill Theater Center, a not-for-profit theater company in Connecticut
* Eugene O'Neill Theatre, a Broadway theatre
* O'Neill, Nebraska, a city
* O'Neill Building, a landmarked former department store in New York City
* O'Neill Center, an athletic complex at Western Connecticut State University
* O'Neill Dam, San Luis Creek west of Los Banos, California
* O'Neill House Office Building, Washington, D.C.
* O'Neill House Office Building (1947), Washington, D.C.; demolished in 2002
* O'Neill Forebay, San Luis Reservoir west of Los Banos, California
* O'Neill Tunnel, Boston, Massachusetts
* Thomas P. O'Neill Jr. Federal Building (Boston), Massachusetts

## Fiction

* The O'Neill, a 1912 American silent film
* April O'Neil, a character in the Teenage Mutant Ninja Turtles franchise
* Danny O'Neil a character from the 1988 movie 14 Going on 30
* Elwood O'Neil, a supporting character and antagonist in Grand Theft Auto V
* Jack O'Neill, a character in the 1989 American action comedy movie Speed Zone
* Jack O'Neill, a character in the Stargate franchise
* Tim O'Neill, a character in the television series seaQuest DSV
* The Trials of Rosie O'Neill, a 1990s American television series

## Companies and organizations

* O'Neill (brand), a surfwear and equipment brand that was started in San Francisco, California
* O'Neill Sea Odyssey, a non-profit organization in Santa Cruz, California
* O'Neills, an Irish sportswear company
* Sandler O'Neill and Partners, a New York City-based investment banking firm
* O'Neal Steel, Inc., an American metal company

## Law

* Dennis O'Neill case, a Welsh child abuse and manslaughter case
* O'Neill v Phillips, a UK company law case on an action for unfair prejudice
* Sheff v. O'Neill, a Connecticut Supreme Court case regarding civil rights and the right to education

## Other

* Eugene O'Neill Award, a Swedish award for stage actors
* O'Neill World Cup of Surfing, an annual event at Sunset Beach in Hawaii
* O'Neill Sebastian Inlet Pro, a surfing event in Florida
* Tip O'Neill Award, an award given out by the Canadian Baseball Hall of Fame
* O'Neill ministry, in the Parliament of Northern Ireland 1963–1969
* O'Neill cylinder, a proposed style of space habitat
* USS O'Neill (DE-188), a Cannon-class destroyer escort in the United States Navy