There are 8 major English dialect areas in North America, presented on the map. These are shown in blue, each with its number, on the map and in the Dialect Description Chart below, and are also outlined with blue lines on the map. The many subdialects are shown in red on the map and in the chart, and are outlined with red lines on the map. All of these are listed in the margins of the map as well.
Via Seth Dixon, MSTA