Jinyang Lake is a reservoir covering portions of Jinju and Sacheon in Gyeongsangnam-do, South Korea. The water surface covers approximately 29 km². It was formed in 1970, by the construction of a dam where the Gyeongho and Deokcheon rivers join to form the Nam River. Most of the Jinju side of the lake is a city park, which was established in 1998. The area has become a popular local attraction, with hotels, restaurants, a small zoo, and the Jinju Land amusement park. Jinyang Lake, like several other regions in the Nakdong River basin, is home to a population of endangered European otters.