| Johnstown | |
| Native Name Lang: | ga |
| Settlement Type: | Town |
| Pushpin Map: | Ireland |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Ireland |
| Subdivision Type: | Country |
| Subdivision Name: | Ireland |
| Subdivision Type1: | Province |
| Subdivision Name1: | Leinster |
| Subdivision Type3: | County |
| Subdivision Name3: | Kilkenny |
| Unit Pref: | Metric |
| Population As Of: | 2022 |
| Population Footnotes: | [1] |
| Population: | 450 |
| Population Density Km2: | auto |
| Timezone1: | WET |
| Utc Offset1: | +0 |
| Timezone1 Dst: | IST (WEST) |
| Utc Offset1 Dst: | -1 |
| Coordinates: | 52.7491°N -7.5569°W |
| Elevation M: | 137 |
| Blank Name: | Irish Grid Reference |
Johnstown, historically known as Coorthafooka[2] (ga|Cúirt an Phúca), is a small town in County Kilkenny, Ireland. Bypassed in December 2008 by the M8, the town lies at the junction of the R639, the R502 and the R435 regional roads. It is the home of the Fenians GAA hurling club. Situated 121km (75miles) from Dublin and 131km (81miles) from Cork, it lies in the agricultural heartland of the southeast.
The village of Johnstown was once part of the barony of Galmoy and was laid out in the early 1700s by the Hely family of Foulkscourt Castle. The Hely family were descended from Sir John Hely (died 1701), Chief Justice of the Irish Common Pleas.
TFI Local link operated by JJ Kavanagh and Sons provides a daily journey each way from Portlaoise to Cashel 828 and Thurles 858. Bus Éireann and Aircoach service between Dublin and Cork ceased to serve Johnstown on 30 June 2012.[3]
Ballyspellan Spa Well is a nearby mineral spa which was visited by Jonathan Swift in 1728. A poem[4] praising its medicinal qualities was penned by Thomas Sheridan and a retort was produced by Swift. In 1806,[5] a Viking Age brooch was found in Ballyspellan[6] and is now on display in the National Museum of Ireland.
Grangefertagh is a 6th Century Round tower situated 3.5km (02.2miles) northeast of the village.[7] It is associated with St Ciarán of Saigir and was attacked by the Vikings in 865.
Foulkscourt Castle, is a Norman-era tower house northwest of the village.[8]