Seán Óg Ó hAilpín (Irish pronunciation: [ˈʃaːn̪ˠ ˌoːɡ oː ˈhalʲpʲiːnʲ]; born 22 May 1977) is a Fijian-Irish hurler and Gaelic footballer.

After starting his career as a hurler at minor level, Ó hAilpín joined the Cork senior hurling team in 1996.

At club level Ó hAilpín is a two-time county hurling championship medalist with Na Piarsaigh.

It was in the "North Mon" that he was also first introduced to Gaelic games, and he quickly became a key component of the school's senior hurling team.

[5] While Ó hAilpín first came into contact with Gaelic games during his secondary schooling, he also linked up with the Na Piarsaigh club on the north side of Cork city.

He subsequently joined the Na Piarsaigh under-21 team, however, he enjoyed little success in this grade, losing two finals in three seasons.

It took Na Piarsaigh almost a decade to qualify for their next county final at senior level, as 2004 saw the club take on east Cork stalwarts Cloyne.

At the second time of asking Cork triumphed and Ó hAilpín collected an All-Ireland Minor Hurling Championship medal.

After a close game Cork emerged victorious by a single point and Ó hAilpín collected a second Munster under-21 medal.

After a defeat at the hands of the men from the west the previous year, Cork gained revenge in 1997 with a 3–11 to 0–13 win in the championship decider.

On this occasion Cork's victory over their old enemy was much more comprehensive and Ó hAilpín added a third consecutive Munster under-21 medal to his collection.

He came on as a substitute for Mark Mullins and assumed the captaincy of the team as the only Na Piarsaigh player on the field of play.

In 1999 Ó hAilpín became a dual star with Cork, a player of both hurling and Gaelic football at senior level.

In an exciting game that saw the lead switch hands on several occasions Cork's hopes of doing the double were dashed as Meath won by 1–11 to 1–8.

A car crash in 2001 almost ended Ó hAilpín's career as his kneecap was severed; however, he overcame this difficulty and fought his way back to fitness in a short period of time.

Embarrassing defeats in 2001 and 2002 saw the Cork hurling team reach rock bottom and call a players strike just before Christmas in 2002.

Ó hAilpín played a huge role as one of the main spokesmen in representing the welfare of his fellow players.

In 2003 Cork's players were vindicated in taking a stand as the team reached the Munster final for the first time in three years.

[13] In spite of losing that day Seán Óg and his brother Setanta were both subsequently honoured with All-Star awards.

While it was expected that Cork and Kilkenny would do battle again in a third consecutive All-Ireland final Galway were the surprise winners of the second semi-final.

Once again neither side broke away into a considerable lead, however, Galway failed to score for the last ten minutes and at the final whistle Cork were ahead by 1–21 to 1–16.

[16] For the second year in-a-row Cork were the All-Ireland champions and Ó hAilpín had the great honour of collecting the Liam MacCarthy Cup.

[17] Following the conclusion of the championship Seán Óg joined his brother, Setanta, a former hurler and currently a player in the Australian Football League with Carlton, for some off-season training.

Subsequent one-point victories over Limerick and Waterford saw Cork qualify for their fourth consecutive All-Ireland final and for the third time Kilkenny were the opponents.

[18] In 2007 Ó hAilpín's side were set out to atone for their All-Ireland defeat the previous year, however, Cork's championship ambitions were hampered from the beginning.

Although defeating Clare in the opening round the so-called Semplegate affair resulted in Ó hAilpín, goalkeeper Donal Óg Cusack and full-back Diarmuid O'Sullivan being suspended for a crucial Munster semi-final clash with Waterford.

[20] In a statement released by the Gaelic Players’ Association he said “I would love to continue to play for Cork, but I must respect the manager's decision in this regard".

[21][22] One year later it was announced on the Cork GAA website that Ó hAilpín would be included in the training squad for the 2012 hurling season.

It was 2007 before he finally collected a Railway Cup hurling medal after Munster defeated Connacht by three points in controversial circumstances.

In November 2017, The Irish Times reported that Fianna Fáil was thinking of Ó hAilpín, an employee of Ulster Bank, as a potential election candidate.