X Brigade, Royal Horse Artillery was a brigade[a] of the Royal Horse Artillery which existed in the early part of the 20th century.

Royal Horse Artillery brigades did not exist as an organizational or operational grouping of batteries until 1 July 1859 when the Horse Brigade, Royal Artillery was formed.

Henceforth, batteries were designated in a single alphabetical sequence in order of seniority from date of formation.

In 1903 it was redesignated as XII Brigade, RHA[8] and was stationed at Mhow, India.

[11] On 18 October 1916, AA Battery[b] was reformed and joined the brigade.