Lisbon is a town in Grafton County, New Hampshire, United States. The population was 1,621 at the 2020 census. Lisbon hosts an annual lilac festival on Memorial Day weekend. The main village, where 965 people resided at the 2020 census, is defined as the Lisbon census-designated place and is located along U.S. Route 302 and the Ammonoosuc Riv…Lisbon is a town in Grafton County, New Hampshire, United States. The population was 1,621 at the 2020 census. Lisbon hosts an annual lilac festival on Memorial Day weekend. The main village, where 965 people resided at the 2020 census, is defined as the Lisbon census-designated place and is located along U.S. Route 302 and the Ammonoosuc River in the southwestern corner of the town.
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