| Competition: | League of Ireland First Division |
| Season: | 2008 |
| Winners: | Dundalk |
| League Topscorer: | Robbie Doyle 16 |
| Prevseason: | 2007 |
| Nextseason: | 2009 |
The 2008 League of Ireland First Division season was the 24th season of the League of Ireland First Division. The First Division was contested by 10 teams and Dundalk won the division.
| Team | Base | Manager | Main sponsor | Kit supplier | Stadium | Capacity | |
|---|---|---|---|---|---|---|---|
| Ganly's Hardware | 2,000 | ||||||
 John Gill | IJM | 6,000 | |||||
| Joe Somerville | Cill Dara Betting | 2,500 | |||||
| Michael Kerley | 8,000 | ||||||
| Flancare | 4,500 | ||||||
| The Squeeling Pig | 3,000 | ||||||
| Cab 2000 | 9,700 | ||||||
| Keelings | 10,000 | ||||||
| Hutchison 3G | Azzurri | 8,000 | |||||
| Wallace Construction | 5,000 |
The regular season began on 7 March and concluded on 15 November. Each team played the other teams four times, totaling 36 games. Only the champions, Dundalk, were automatically promoted and there was no promotion/relegation play-off between Premier Division and First Division teams. This was because the 2009 Premier Division would be reduced to 10 clubs.[2]
Kildare County and Mervue United, the highest ranked non-reserve team from the 2008 A Championship, played off to see who would play in the 2009 First Division. Mervue United won 5–2 on aggregate and were promoted to the First Division.[3]
| Goalscorers | Goals | Team |
|---|---|---|
| Robbie Doyle | 16 | Sporting Fingal[4] |
| Anthony Flood | 15 | Shelbourne |
| Darren McKenna | 13 | Longford Town |
| Robbie Farrell | 11 | Dundalk |
| Vinny Sullivan | 11 | Waterford United |