Route 108 in the U.S. state of Connecticut, locally called Nichols Avenue and Huntington Turnpike, is a two-lane state highway that runs northerly from US 1, Boston Post Road in Stratford, through Trumbull, to Route 110 in downtown Shelton.

Originally called the Farm Highway, it was laid out to the south side of Mischa Hill in Trumbull on December 7, 1696 and is considered to be the third oldest documented highway in Connecticut after the Mohegan Road (Route 32) in Norwich (1670) and the Boston Post Road or US 1 (1673).

[2] The section of Nichols Avenue from the Stratford-Trumbull town line to Huntington Turnpike in Trumbull is known as the Trooper Ernest Morse Memorial Highway, named in honor of a state trooper who was killed by gunfire on February 13, 1953, while trying to apprehend a suspect in a car theft.

Past Nichols center, it continues northward and intersects with Isinglass Road as it makes its way into the village of Huntington in Shelton.

It bisects the historic Huntington green separating the common from the old St. Paul's Episcopal Church and old burial ground [2].