Thomaston officially became a village on October 1, 1931, after the majority of residents voted in favor of incorporation to preserve home rule.

[2] The founders of the Incorporated Village of Thomaston were John W. Weight, Hunter L. DeLatour, Ernest A. Gallagher, and Henry A.

[3] William R. Grace, a prominent local who would eventually become the Mayor of New York City, acquired a large area of land around the Long Island Rail Road's Great Neck station; the land he acquired included all of present-day Great Neck Plaza.

Grace named the area Thomaston after the ancestral home of his wife, Lillian Gilchrist, located in Maine.

[9][12] Thomaston is located in New York's 3rd congressional district, which as of July 2021 is represented in the United States Congress by Tom Suozzi (D–Glen Cove).

[9][13] Like the rest of New York, Thomaston is represented in the United States Senate by Charles Schumer (D) and Kirsten Gillibrand (D).

[15] The majority of Thomaston is located within the boundaries of (and is thus served by) the Great Neck Union Free School District, although a small part of the village's northeastern corner is located within the Manhasset Union Free School District (though all homes are in the Great Neck part of Thomaston).

[9] The majority of Thomaston is located within the boundaries of (and is thus served by) the Great Neck Library District, although a small part of the village's northeastern corner is located within the Manhasset Library District (though all homes are in the Great Neck part of Thomaston).

[17] All of these bus routes (excluding the n57) travel through the area via Northern Boulevard and Middle Neck Road.

[18][20] Additionally, PSEG's Port Washington to Great Neck Overhead Transmission Line passes through the village.

[9] The eastern portions of the village are within the boundaries of (and are thus served by) the Great Neck Water Pollution Control District.

[9] The small portion of the village west of Middle Neck Road is within the boundaries of (and is thus served by) the Belgrave Sewer District.