Hamchang is an eup in Sangju City, North Gyeongsang province, South Korea. It comprises 30 distinct ri (the smallest South Korean administrative division), and has a population of 8,427 (from 2003 registration figures). There are two elementary schools, a middle school and a high school. Hamchang was once the capital of a small kingdom, Goryeong Gaya. Although its role today is far less central, it remains an important local town, served by intercity buses as well as the Gyeongbuk Line railroad.