Horse Grenadiers may refer to any of the following cavalry units:
Horse Grenadier Guards, British division of the Household Cavalry, founded in 1687 and disbanded in 1788 Mounted Grenadiers of the Imperial Guard, French cavalry regiment, founded in 1804 and disbanded in 1815 Mounted Grenadiers Regiment, Argentinian cavalry regiment, founded in 1812
See also Dragoon Grenadier