Eric Gugler (March 13, 1889 – May 17, 1974) was an American Neoclassical architect, interior designer, sculptor and muralist. He was selected by President Franklin D. Roosevelt to design the Oval Office.

Gugler was born in Milwaukee, Wisconsin, the son of printer and engraver Julius Gugler and his wife Bertha Bremer. He studied at the Armour Institute in Chicago, Illinois, and the School of the Art Institute of Chicago. He graduated from Columbia University in 1911, and was awarded the 1911 McKim Fellowship in Architecture. He studied at the American Academy in Rome, 1911–1914. He returned to the United States, and worked in the offices of McKim, Mead & White. During World War I, he served in the American Camouflage Corps (Company A, 40th Engineers, U.S. Army). He opened his own architectural office in 1919.

With sculptor Paul Manship and muralist Francis Barrett Faulkner, Gugler created the American Academy in Rome War Memorial (1923–24). Installed beneath a portico in the courtyard of the Villa Aurelia, it features a pink marble bench flanked by kneeling doughboys, and surmounted by an arched mosaic mural of a lone sailor steering his boat through rough seas beneath the constellations.

Gugler altered a rowhouse at 319 East 72nd Street, Manhattan into Manship's residence and studio in 1925. Gugler later bought a 5-foot (1.52 m) diameter glass sphere etched with the constellations. He lent this to Manship, who created multiple sculptures inspired by it. For what became the Aero Memorial (plaster 1933), Manship modeled Zodiac figures in clay directly atop the glass sphere, then cast them in plaster and bronze. In projects together and separately, Gugler and Manship repeatedly returned to the idea of spheres, heavenly bodies and signs of the Zodiac.

Gugler and architect Roger Bailey won a 1929 design competition for the World War I memorial for the City of Chicago. Because of the Great Depression, the $3,000,000-to-$5,000,000 project was never built. Gugler designed a massive obelisk as a World War I memorial for Battery Park, at the southern tip of Manhattan. It also was never built.

Gugler and muralist Ricard Brooks created large Art Deco murals for the 1,883-seat Forum Auditorium of the Pennsylvania State Library and Education Building (1931) in Harrisburg. The walls of the semi-circular hall feature mural maps of ancient empires. The vast celestial ceiling mural depicts constellations and signs of the Zodiac, and incorporates lighting and ventilation fixtures. The building, by architects William Gehron and Sidney Ross, also features architectural sculpture by Lee Lawrie, Carl Paul Jennewein and Harry Kreis. The auditorium is home to the Harrisburg Symphony Orchestra.

In New York City's Central Park, overlooking Conservatory Water, is the Waldo Hutchins Memorial Bench, a curved Concord white granite exedra designed by Gugler. The bench is almost 4 feet (1.2 m) tall, 27 feet (8.2 m) wide, and weighs several tons. It was executed in 1932 by the Piccirilli Brothers studio, the firm that carved the Lincoln Memorial in Washington, D.C. The bench has a small sundial, a variation on a 3rd century BC Hellenistic period Berossus sundial, at its back designed by sculptor Albert Stewart. The sundial features a small Art Deco bronze gnomon sculpture of a female dancer trailed by a wind-blown gown and flowing scarves at its center. The gnomon sculpture was modeled by sculptor Paul Manship.

Gugler collaborated with architect Henry J. Toombs on Georgia Hall (1932–33), the main building of Franklin D. Roosevelt's Warm Springs Institute in Warm Springs, Georgia.