H-block

H-block or h-block may refer to:


 * H Block, a compilation album by various Irish folk artists
 * H Block (Hong Kong), a 1970s block design in Hong Kong
 * H engine, an internal combustion engine having the cylinders in an H pattern
 * Maze (HM Prison), Belfast, where the prison blocks were built to a uniform H-shaped plan
 * Anti H-Block, 1981 Irish Republican election label


 * H-block in aggressive inline skating, part of the frame of the skate
 * The 1915–1920 and 1995–2000 MHz radio frequency bands, used for wireless broadband communications; see