In 1956 Kuala Sedili was a small fishing village at the mouth of the Sedili River, and access to the port was by boat from the Kota Tinggi to Mersing Road where it crossed the river. The river is quite deep and is saline for some distance upstream.
The Public Works Department of the day (now Jalan Kerja Raya?) began building a road to access the port in 1956 and would have finished it in 1957. At that time the main village was situated on the northern bank of the river, but all later development took place on the southern bank at the road head.
Kuala is a town and subdistrict of Langkat Regency. It borders Selesai to the north, Salapian to the west, and Sei Bingai to the south and east. Most people in Kuala are Javanese people, with a significant Karo population. Although most Karo are Christian, many are also Muslim, and as the Javanese are nearly 100% Muslim, Kuala subdistrict is 80% Muslim.
Kuala town itself had a population of 12,459, making it by far the largest settlement in the district. Kuala town is on the main road between Binjai and Bukit Lawang.
Agriculture in Kuala subdistrict is relatively homogenous, with 6,425 hectares of oil palm, 4,243 hectares of sawah (wet rice), 880 hectares of maize and 3,466 hectares of natural rubber, with little land devoted to other crops. There are five factories in the subdistrict.
Kuala is a Malay/Indonesian word meaning estuary or confluence, and is a component of many placenames in Malaysia, Brunei and Indonesia, the most prominent being Kuala Lumpur, capital of Malaysia.
Settlements with Kuala as part of the name: