The Sikh Empire, ruled by members of the Sikh religion, was a political entity that governed the Northwestern regions of the Indian subcontinent. The empire, based around the Punjab region, existed from 1799 to 1849. It was forged, on the foundations of the Khalsa, under the leadership of Maharaja Ranjit Singh (1780–1839) from an array of autonomous Punjabi Misls of the Sikh Confederacy.

Maharaja Ranjit Singh consolidated many parts of northern India into an empire. He primarily used his Sikh Khalsa Army that he trained in European military techniques and equipped with modern military technologies. Ranjit Singh proved himself to be a master strategist and selected well-qualified generals for his army. He continuously defeated the Afghan armies and successfully ended the Afghan-Sikh Wars. In stages, he added central Punjab, the provinces of Multan and Kashmir, and the Peshawar Valley to his empire.

At its peak, in the 19th century, the empire extended from the Khyber Pass in the west, to Kashmir in the north, to Sindh in the south, running along Sutlej river to Himachal in the east. After the death of Ranjit Singh, the empire weakened, leading to conflict with the British East India Company. The hard-fought First Anglo-Sikh War and Second Anglo-Sikh War marked the downfall of the Sikh Empire, making it among the last areas of the Indian subcontinent to be conquered by the British.