County Kildare, located in the province of Leinster, is bordered by six counties:
| Direction | County | Key Boundary Features |
|---|---|---|
| North | Meath | River Boyne forms part of the boundary |
| East | Dublin | Urban fringe; M50 motorway corridor |
| Southeast | Wicklow | Wicklow Mountains foothills |
| South | Carlow | River Barrow forms much of the border |
| Southwest | Laois | Rural lowlands; Grand Canal crosses here |
| West | Offaly | Bog of Allen; River Figile |