Maynooth is served by a dedicated twin line from Dublin, and also benefits from being the last stop before Dublin on the intercity line from Sligo and Longford to Dublin.
Direct links are available from the following stations in the Dublin area to Maynooth:
- Pearse Station, Dublin
- Tara Street Station, Dublin
- Connolly Station, Dublin
- Dromcondra, Dublin
- Broombridge, Dublin
- Ashtown, Dublin
- Phoenix Park, Dublin
- Castleknock, County Dublin
- Coolmine, County Dublin
- Clonsilla, County Dublin (Fingal)
- Leixlip Confey, County Kildare
- Louisa Bridge, Leixlip, County Kildare
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Direct links are available from seven couties and the following stations west of Maynooth.
- Kilcock, County Kildare
- Enfield, County Meath
- Mullingar, County Westmeath
- Edgeworthstown, County Longford
- Longford Town
- Dromod, County Leitrim
- Carrick-on-Shannon, County Leitrim
- Boyle, County Roscommon
- Ballymote, County Sligo
- Collooney, County Sligo
- Sligo Town
* * * * * * * * * * * * * * * * * * * * * * * * *
From all other rail services:
Connections to Maynooth can be made at Connolly Station in Dublin from:
- The Dart - A suburban train which links the coastal communities from Howth to Greystones to Maynooth.

- The Northern Line - which comes down the East Coast from the North Dublin suburbs of Portmarnock, Malahide, Rush, Lusk, Skerries, and also from Balbriggan, Drogheda, Dundalk, Belfast and beyond.
- The Southern Line - which comes up the East Coast from the Southern Dublin suburb of Dun Laoghaire, and also from Bray, Greystones, Wicklow, Gorey, Enniscorthy, Wexford and Rosslare.
- Heuston Station via the Luas - Trains converge in Heuston Station from the rest of Ireland:
- Carlow, Kilkenny, Waterford line
- Portlaoise, Thurles, Limerick Junction, Mallow, Cork & Tralee lines
- Ballybrophy, Nenagh, Limerick line
- Athlone, Galway line
- Castlerea, Claremorris, Westport and Ballina lines

Map from www.irishrail.ie