In heraldry, a knight on horseback is one of the most direct emblems of chivalry, martial honor, noble service, and active defense. The mounted knight combines two powerful symbols: the armed warrior and the horse, a creature of speed, endurance, and disciplined strength. Together they express readiness to fight for lord, land, faith, or community. Unlike a sword or helmet alone, the mounted knight suggests motion and purpose, often portraying the bearer as a defender, crusader, champion, or founder whose identity is tied to action rather than passive rank.

The figure is especially common in civic, dynastic, and national heraldry where a legendary or historical warrior embodies local identity. The arms of Lithuania, known as the Vytis, show an armored rider with raised sword and shield, symbolizing national defense and sovereign authority. Similar mounted warrior imagery appears in the arms of Moscow, where Saint George on horseback defeats the dragon, joining military courage with Christian victory over evil. Such figures may also represent patron saints, founders, royal grants, frontier defense, or memories of crusading and cavalry service.

As a heraldic charge, the knight on horseback may be fully armed, carrying a lance, sword, banner, shield, or cross, and the horse may be caparisoned to display additional arms. It can appear on the shield, as a crest, or in seals and civic badges, where its narrative force is especially effective. Useful context can be found through the College of Arms, the Heraldry Society, and examples of riders at Heraldry of the World. In coats of arms, the mounted knight remains a dramatic symbol of courage in motion, lawful power, and the ideals of knighthood.