The Himyarite Kingdom (Arabic: مملكة حِمْيَر, romanized: Mamlakat Ḥimyar, Hebrew: ממלכת חִמְיָר) or Himyar (Arabic: حِمْيَر, Ḥimyar; Ṣayhadic: 𐩢𐩣𐩺𐩧𐩣, Ḥmyrm), historically referred to as the Homerite Kingdom by the Greeks and the Romans (its subjects being called Homeritae), was a polity in the southern highlands of Yemen, as well as the name of the region which it claimed. Until 110 BCE, it was integrated into the Qatabanian kingdom, afterwards being recognized as an independent kingdom. According to classical sources, their capital was the ancient city of Zafar, relatively near the modern-day city of Sana'a. Himyarite power eventually shifted to Sana'a as the population increased in the fifth century. After the establishment of their kingdom, it was ruled by kings from dhū-Raydān tribe. The kingdom was named Raydān.

The kingdom conquered neighbouring Saba' in c. 25 BCE (for the first time), Qataban in c. 200 CE, and Haḍramaut c. 300 CE. Its political fortunes relative to Saba' changed frequently until it finally conquered the Sabaean Kingdom around 280. Himyar then endured until it finally fell to invaders from the Kingdom of Aksum in 525 CE.

The Himyarites originally worshiped most of the South-Arabian pantheon, including Wadd, ʿAthtar, 'Amm and Almaqah. Since at least the reign of Abikarib Asʿad (c. 384 to 433 CE), Judaism was adopted as the de facto state religion. The religion may have been adopted to some extent as much as two centuries earlier, but inscriptions to polytheistic deities ceased after this date. It was embraced initially by the upper classes, and possibly a large proportion of the general population over time.

Descendants of the Himyarites, namely the aristocratic families of Dhu'l-Kala and Dhu Asbah, played a prominent role in early Islamic Syria. They led the South Arabian contingents of the Muslim army during the conquest of Homs in 638 and contributed to making Homs a center for South Arabian settlement, culture and political power. Their chiefs supported Mu'awiya ibn Abi Sufyan against Caliph Ali in the First Muslim Civil War (656–661). Their influence waned with their defeat at the Battle of Marj Rahit against the Quda'a confederation and the Umayyad caliph Marwan I in 684 and practically diminished with the death of their leader at the Battle of Khazir in 686. Nonetheless, members of the Dhu'l-Kala and Dhu Asbah played important roles at different times through the remainder of Umayyad rule (661–750) as governors, commanders, scholars, and pietists.