2018 Kilkenny Junior Hurling Championship

The 2018 Kilkenny Junior Hurling Championship was the 108th staging of the competition since its establishment by the Kilkenny County Board in 1905 and ran from 25 August to 21 October 2018.

The competition consisted of 20 teams divided into sections A and B. Section A comprised 12 junior-grade clubs represented by their first-team panels. Section B comprised eight senior/intermediate-grade clubs represented by their second-team panels. Three teams from Section A (quarter-final winners) and one from Section B (final winner) advanced to the combined semi-final stage.

Dunnamaggin defeated Piltown by 116 to 208 in the final on 21 October 2018 at Nowlan Park, Kilkenny. As 2018 junior champions they were promoted to the 2019 Kilkenny Intermediate Hurling Championship.

Clara defeated Tullaroan in the Section B relegation play-off by 521 to 319, preserving their place in the top junior grade. The losing side were demoted to the Kilkenny Junior A Hurling Championship for 2019.

Section A

 * Barrow Rangers
 * Blacks and Whites
 * Cloneen
 * Conahy Shamrocks
 * Dunnamaggin
 * Emeralds
 * Galmoy
 * Graiguenamanagh
 * Kilmacow
 * Piltown
 * Slieverue
 * Windgap

Section B

 * Ballyhale Shamrocks
 * Clara
 * Dicksboro
 * James Stephens
 * O'Loughlin Gaels
 * Rower-Inistioge
 * St Patrick's
 * Tullaroan