Avoca is a city in Murray County, Minnesota, United States. The population was 111 at the 2020 census. According to the United Stat…Avoca is a city in Murray County, Minnesota, United States. The population was 111 at the 2020 census. According to the United States Census Bureau, the city has a total area of 1.169 square miles, of which 0.964 square miles is land and 0.205 square miles is water. It is just south of Lime Lake.
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