Lyndon is the second-most populous town in the Northeast Kingdom; only neighboring St. Johnsbury is larger.

[4] When Rhode Island proprietors secured the original Lyndon township grant, the area was covered in forests and woodlands.

The Passumpsic River, flowing through the center of the town, provided power for grist and saw mills.

Some of the men held high positions of rank, including Jonathan Arnold, William Greene, and James Manning, the President of Rhode Island College, later Brown University.

They needed men in search of free land, who would clear each proprietor's grant in return for a portion of it.

These families installed roads, mills, homes, barns, fields, crops, churches, and schools.

[6] Meetings held in Lyndon in the late 1880s by local resident Theodore Newton Vail led to the creation of American Telephone & Telegraph.

In addition to other contributions to Lyndon, Vail constructed Vermont's first paved road from the railroad depot to his estate.

[10] The Lyndon Outing Club held an annual winter festival in the late 1930 to early 1940s.

It is bordered by the town of St. Johnsbury to the south, Danville to the southwest, Wheelock to the west, Sutton to the north, Burke to the northeast, and Kirby to the east.

[12] The highest point in Lyndon is Diamond Hill in the southwest, with an elevation of slightly greater than 1,640 feet (500 m).

[13] Lyndonville, the main village in town, is partially located on a high kame terrace.

The Lyndon Town Clerk is Dawn R. Dwyer, and the Selectboard members are Dan Daley III, Christian Thompson, and Fred Gorham.