Pakpattan (Punjabi and Urdu: پاکپتّن), often referred to as Pākpattan Sharīf ( پاکپتّن شریف; "Noble Pakpattan"), is an ancient, historic city in the Pakistani province of Punjab, serving as the headquarters of the eponymous Pakpattan district. It is among the oldest cities in Asia and ranks as the 48th largest city in Pakistan by population, according to the 2017 census. Pakpattan is the seat of the Sufi Chisti order in Pakistan, and a major pilgrimage destination on account of the Shrine of Baba Farid, a renowned Punjabi poet and Sufi saint. The annual urs fair in his honour draws an estimated 2 million visitors to the town. Over its long history, Pakpattan has endured numerous attacks, followed by cycles of destruction and reconstruction, reflecting its resilience and historical significance.

Pakpattan was originally known as Ajodhan (Hindi: अजोधन) until the 16th century. Ajodhan may be a Sanskrit term that can be interpreted as "eternal wealth" or "eternal prosperity," with Aja meaning "unborn" or "eternal" and Dhana meaning "wealth" or "prosperity." This concept reflects the area's historical and cultural significance, particularly during the medieval period when it served as a prominent center of trade and spiritual learning. It is believed that the name of the city has changed over time, and anecdotally, it may have been known by various names prior to being called Ajodhan.

Pakpattan derives its current name from the combination of two Punjabi words: Pak, meaning "pure," and Pattan, meaning "dock"; this name references a ferry service across the Sutlej River, frequented by pilgrims visiting the Shrine of Baba Farid. The ferry symbolized a metaphorical journey of salvation, with the saint’s spirit guiding believers across the river.

During the Delhi Sultanate and Mughal eras, including the reigns of Akbar and Aurangzeb, the city continued to be known as Ajodhan. However, as the shrine of Baba Farid grew in significance, the name "Pakpattan" gained popular use. Akbar’s Ain-i-Akbari mentions the region, indicating that both names—Ajodhan and Pakpattan—were likely used interchangeably in local and administrative records. Over time, the reverence for Baba Farid's legacy led to "Pakpattan" gradually eclipsing the older name, Ajodhan.

Pakpattan is located about 205 km from Multan. Pakpattan is located roughly 40 kilometres (25 mi) from the border with India, and 184 kilometres (114 mi) by road southwest of Lahore. The district is bounded to the northwest by Sahiwal District, to the north by Okara District, to the southeast by the Sutlej River and Bahawalnagar District, and to the southwest by Vehari District.

Pakpattan, located in the fertile plains of Punjab, Pakistan, is believed to have roots that trace back to the Sarasvati-Indus Valley Civilization (est. >7000–1900 BCE), one of the world's oldest urban cultures, located in the Northern area of the Indian subcontinent. Although Pakpattan is widely recognized for its medieval history, its geographical proximity to Harappa, a major center of the Sarasvati-Indus Valley Civilization, suggests that the area may have been part of this ancient network of settlements. Harappa, situated approximately 40 kilometers from Pakpattan, has yielded extensive archaeological evidence of a highly developed urban society characterized by advanced trade, agriculture, and infrastructure.

The Sutlej River, which flows near Pakpattan, played a significant role as a waterway for early civilizations, further supporting the likelihood of human habitation in the region during the Sarasvati-Indus Valley period. While no specific remains of this civilization have been discovered in Pakpattan itself, its location and environmental advantages suggest that it was likely connected to the broader cultural and economic networks of the time. This potential link adds depth to Pakpattan's ancient heritage, emphasizing its historical significance beyond its later medieval prominence.

During the Vedic period (est. >6000-500 BCE), the region now known as Pakpattan was part of the Sapta Sindhu, the "Land of Seven Rivers," prominently mentioned in the Rigveda as the cradle of early Indo-Aryan civilization. The area was traversed by the Sutlej River, known in Vedic times as the Shatudri ("Hundred Streams"), one of the sacred rivers of the Sapta Sindhu region. This era saw the composition of the Vedas and the establishment of a society centered on pastoralism and agriculture. The region was inhabited by tribes mentioned in the Rigveda, such as the Purus, Druhyus, Anus, Turvasas, and Yadus, who engaged in intertribal conflicts and alliances that shaped the cultural and political landscape. Vedic society in the area was patriarchal and organized into clans led by tribal chiefs (Rajans). Religious practices focused on rituals and the worship of natural forces and deities such as Indra, Agni, and Varuna. The Sutlej River played a vital role in sustaining the inhabitants and influencing the region's spiritual and cultural significance in early Vedic civilization.