Noank is a village in the town of Groton, Connecticut. This dense community of historic homes and local businesses sits on a small, steep peninsula at the mouth of the Mystic River with a long tradition of fishing, lobstering and boat-building. The village is listed as a historic district on the National Register of Historic Places and is the home of multiple seasiā¦Noank is a village in the town of Groton, Connecticut. This dense community of historic homes and local businesses sits on a small, steep peninsula at the mouth of the Mystic River with a long tradition of fishing, lobstering and boat-building. The village is listed as a historic district on the National Register of Historic Places and is the home of multiple seaside lobster shacks and oyster aquaculture operations. The population was 1,796 at the 2010 census.