J23

J23 may refer to:

Roads

 * County Route J23 (California)
 * Malaysia Federal Route J23

Vehicles

 * FVM J 23, a Swedish fighter aircraft
 * GNR Class J23, a British steam locomotive
 * HMS Abingdon (J23), a Hunt-class minesweeper of the Royal Navy
 * HSWMS Hälsingland, an Östergötland-class destroyer of the Swedish Navy

Other uses

 * Agent J-23, a character in the Polish television series Stawka większa niż życie
 * Gyroelongated square cupola, a Johnson solid (J23)
 * J23, an album by Danny K
 * The 2023 Spanish general election, nicknamed "23J" by the Spanish media