Solomon Andrew Layton (July 22, 1864 – February 6, 1943) was an American architect who designed over 100 public buildings in the Oklahoma City, Oklahoma area and was part of the Layton & Forsyth firm.

Layton began practicing architecture in Denver in 1887; in 1902, he moved to El Reno, Oklahoma and began to design buildings in El Reno - Oklahoma City area, the most notable being the Canadian County Courthouse,[a] and the Canadian County Jail.

Twenty-two of his buildings are listed on the National Register of Historic Places, an Oklahoma state record.

[3] He designed the neoclassical Oklahoma State Capitol in 1914 and created the original plans to add a dome to the building, a feature which was not installed until 2002.

Eleven of Layton's buildings, including seven on the National Register of Historic Places, survived the 1995 Oklahoma City bombing.