Luke Marcus O'Neill (born 20 August 1991) is an English professional footballer who plays as a right back for National League club Ebbsfleet United.

[citation needed] He was named as a substitute for the first time in a League Cup win over Stockport County on 12 August 2008, however he was unused on that occasion.

[8] O'Neill's next first-team involvement for Leicester came almost a year later when he was named as an unused substitute in their opening day fixture against Swansea City.

[10] On 26 December 2009, O'Neill made his league debut for Leicester, coming on as a half-time substitute against Sheffield United, replacing the injured Jack Hobbs.

[17] His debut came the following day in a 3–0 away defeat to Torquay United, before scoring his first goal for York in a 2–2 draw away to Chesterfield with a 30-yard shot into the bottom right corner.

[22] He joined Scunthorpe United on 18 August 2014 on a three-month loan,[23] making his debut a day later in a 2–0 home defeat to Fleetwood Town.

[33] In November 2021, he dropped back into non-League football when he signed for National League North club Kettering Town on a free transfer, having previously spent time on loan there in 2011.