Martha's Vineyard, New England's largest resort island, was formed by glacial action 10,000 years ago and lies 7 miles off the coast of Cape Cod, in the Commonwealth of Massachusetts, USA. The Island is roughly triangular-shaped with its base the straight south shore. It is 9 miles wide and 23 miles long at its furthest points; the total land area is approximately 100 square miles. Martha's Vineyard has a total of 124.6 miles of tidal shoreline. MAP
As a resort area, the population changes dramatically from one season to the next. Martha’s Vineyard has a year-round population of about 20,000 swelling to 100,000 in the summer. An additional 25,000 visitors are coming and going onferries every day. It is made up of several distinct groups: year-round residents, seasonal residents who have second homes here, visitors who come for the season, a month, a week or perhaps only a day.