Adam Phillips Leighton

Adam Phillips Leighton (April 6, 1851 – August 24, 1922) was an American politician from Maine. He served as Mayor of Portland from 1908 to 1909. A resident of the West End, his historic home—now known as the Adam P. Leighton House—is located at 261 Western Promenade and is located on the National Register of Historic Places.

Leighton was a businessperson and is considered the "father of the picture post card industry".

As Chisholm Brothers expanded and acquired news agency privileges on the Grand Trunk Railway, Leighton advanced in the company. He was placed in charge of the companies business at the Grand Trunk Railway Station. He became vice-president of that operation and pioneered the practice of placing newspapers and magazines on railroad cars. He later became involved in the manufacture of chewing gum.

He was a member of the Knights of Pythias and Knights Templar.