Baile Ualstair · Co. Kildare
The eastern edge of Celbridge - a quiet residential townland with a ruined medieval church and a Norman priory hidden along the Liffey.
Ballyoulster is not a separate village so much as the eastern end of Celbridge. The name is old - Baile Ualstair, 'Oulster's town', written down in the Ordnance Survey of 1837 - but what you see today went up between 1948 and 1951, one of the residential areas that grew Celbridge out from its single long street. The Central Statistics Office still counts it on its own: 479 people at the last reliable headcount, and in 2022 it had the oldest average age of any Irish town over 500 - the houses filled up after the war and the people who moved in stayed put.
So treat it as a townland with a postcode, not a place to visit in its own right. There is no village centre here, no pub on a green, no main street. What Ballyoulster has instead is location: it sits in the civil parish of Donaghcumper, between the Liffey and the Dublin Road, a few minutes' walk from things genuinely worth seeing. The ruined medieval church of Donaghcumper is in the next townland north. St Wolstan's Priory, founded by the Normans in 1202, stands on the south bank of the river a little to the east. Celbridge proper - with Castletown House, the pubs and the shops - is on your doorstep to the west.
If you are staying out this way, walk west into Celbridge for the evening and east along the Liffey for the morning. Ballyoulster itself is somewhere people live, quietly, in good houses on roads that were fields within living memory. That is an honest thing for a place to be. It is just not, on its own, a reason to stop the car.