When considering the population of a town, it is important to consider the demographics of that town. Block Island has a total of 1,606 households, of which 472 are permanently occupied. The remaining homes are seasonally or recreationally occupied. Nearly half of the Block Island households are non-family, which includes single adults. This is slightly higher than the statewide percentage of 48 percent.
The climate on Block Island is affected by the surrounding ocean and the prevailing winds. The climate of the island is oceanic, bordering on humid continental climate and subtropical climate. The spring and summer months are cool, and the Indian population on Block Island is approximately 1200-1500 people, although the number is likely to rise in the coming years. In 1664, there were as many as 51 residents. In 1774, the population was just 51.
The North Lighthouse, located on the northern tip of Block Island, was constructed in 1829 and renamed after the Dutch town of Haarlem. The lighthouse is one of several landmarks on Block Island, but its purpose is to warn boaters of a sandbar. The dunes are part of a wildlife refuge, and many species, including piping plover and the American burying beetle, reside here. Near the downtown area, the Block Island Historical Society Museum exhibits artifacts and historic items.