Sahiwal, formerly known as Montgomery, is a city in Punjab, Pakistan. It is the 21st largest city of Pakistan by population and the administrative …Sahiwal, formerly known as Montgomery, is a city in Punjab, Pakistan. It is the 21st largest city of Pakistan by population and the administrative capital of both Sahiwal District and Sahiwal Division. Sahiwal is approximately 180 km from the major city Lahore and 100 km from Faisalabad and lies between Lahore and Multan. Sahiwal is approximately 152 meters above the sea level.