Deli Serdang is a regency in the Indonesian province of North Sumatra. It surrounds the city of Medan, and also borders to the west the city of Binjai, which is effectively a bedroom community for Medan. The entire regency lies within the Medan metropolitan area. It occupies an area of 2,241.68 km2. The capital of the district is Lubuk Pakam, which is located approximately 30 km east of Medan. The national census of 2000 recorded 1,573,987 people, but by 2010 the regency's population increased by 13.76% to 1,790,431, and at the 2020 Census the total was 1,931,441. The official estimate as at mid 2023 was 2,018,164. Kualanamu International Airport is located in this regency.

North Sumatra is a province of Indonesia located in the northern part of the island of Sumatra. Its capital and largest city is Medan. It is bordered by Aceh on the northwest and Riau and West Sumatra on the southeast, with two different coastlines located on the Indian Ocean and the Strait of Malacca, and a maritime border with Malaysia to the east. North Sumatra is Indonesia's fourth most populous province after West Java, East Java, and Central Java, and is also the most populous province outside of Java Island. North Sumatra is also the third-largest province in area on the island of Sumatra after South Sumatra and Riau provinces. It covers an area of 72,460.74 km2, which is approximately the same size as Sierra Leone or Scotland or Maine.