Edwin Denison Morgan III (October 19, 1854 – June 13, 1933) was an American yachtsman during the turn of the 19th century.

[2] After college, he became a highly successful businessman, and was the founder of Nassau Light and Power, a shareholder in many significant livestock interests, and president, at the beginning of the 1900s of mining companies the Corralitos Company and Candelaria Mining Co in Mexico.

Summer residence, nicknamed the "Acropolis of Newport" completed around 1890 in Newport, Rhode Island for Morgan, and designed by architect Stanford White of Mckim Mead & White.

Residence in Old Westbury, Long Island, NY, it was built over a 10-year period, and designed by architect firm McKim, Mead & White.[4]E.D.

He also commissioned the construction of the largest steel hull schooner of the time, the Constellation, designed by Edward Burgess.