| Competition: | League of Ireland Premier Division |
| Season: | 2011 |
| Matches: | 180 |
| Total Goals: | 503 |
| Winners: | Shamrock Rovers (17th title) |
| Relegated: | Galway United |
| Continentalcup1: | UEFA Champions League |
| Continentalcup1 Qualifiers: | Shamrock Rovers |
| Continentalcup2: | UEFA Europa League |
| Continentalcup2 Qualifiers: | Sligo Rovers St. Patrick's Athletic Bohemians |
| Continentalcup3: | Setanta Cup |
| League Topscorer: | Éamon Zayed 22 |
| Biggest Home Win: | Derry City 7–0 UCD |
| Biggest Away Win: | Galway United 0–8 Sligo Rovers |
| Highest Scoring: | UCD 5–4 Drogheda United |
| Longest Wins: | Shamrock Rovers, Sligo Rovers (5 games each)[2] |
| Longest Unbeaten: | Derry City (18 games) |
| Longest Winless: | Galway United (32 games) |
| Longest Losses: | Galway United (22 games) |
| Prevseason: | 2010 |
| Nextseason: | 2012 |
The 2011 League of Ireland Premier Division was the 27th season of the League of Ireland Premier Division. The league was also known as the Airtricity League for sponsorship reasons. The division featured 10 teams. Shamrock Rovers were champions while Sligo Rovers finished as runners-up.
The Premier Division consists of ten teams. Each team played every other team four times, twice at home and twice away, for a total of 36 matches. The league began on 4 March[3] and ended on 29 October. Defending champions Shamrock Rovers retained the league title with victory over UCD on 25 October 2011.[4] [5]
| Rank | Scorer | Club | Goals | |
|---|---|---|---|---|
| 1 |  Éamon Zayed | Derry City[6] | 22 | |
| 2 |  Eoin Doyle | Sligo Rovers | 20 | |
| 3 | Danny North | St. Patrick's Athletic | 15 | |
| Gary Twigg | Shamrock Rovers | 15 | ||
| 5 | Mark Quigley | Dundalk | 13 |
| Month | Player | Club | |
|---|---|---|---|
| March | Mark Quigley | Dundalk | |
| April | Gary Dempsey | Bray Wanderers | |
| May | Eoin Doyle | Sligo Rovers | |
| June | Danny North | St. Patrick's Athletic | |
| July | Conor McCormack | Shamrock Rovers | |
| August | Patrick Sullivan | Shamrock Rovers | |
| September |  Joseph Ndo | Sligo Rovers | |
| October | Karl Sheppard | Shamrock Rovers | |
| November | Stephen Paisley[8] | Shelbourne |
Galway United, the tenth-placed team in the 2011 Premier Division, and Monaghan United, the third-placed team from the 2011 First Division, played off to see who would play in the 2012 Premier Division. The playoff was contested in a two-legged format.[9]
Monaghan United won 5–1 on aggregate and were promoted to the Premier Division. Galway United were relegated to the First Division.