Jinyang Lake (Korean: 진양호) is a reservoir covering portions of Jinju and Sacheon, South Gyeongsang Province, South Korea. The water surface covers 29.4 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 Eurasian otters.

• Official park office website, in Korean Archived 2006-10-08 at the Wayback Machine