Eric Allen Johnston (December 21, 1896 – August 22, 1963) was a business owner, president of the United States Chamber of Commerce, a Republican Party activist, president of the Motion Picture Association of America (MPAA), and a U.S. government special projects administrator and envoy for both Democratic and Republican administrations. As president of the MPAA, he abbreviated the organization's name, convened the closed-door meeting of motion picture company executives at New York City's Waldorf-Astoria Hotel that led to Waldorf Statement in 1947 and the Hollywood blacklist (including firing of the Hollywood Ten), and discreetly liberalized the Motion Picture Production Code. He served as president of the MPAA until his death in 1963.

An Episcopalian, Johnston was born "Eric Johnson" in Washington, D.C. His father, a pharmacist, moved the family to Marysville, Montana, when Johnston was a year old. In 1905, the family moved to Spokane, Washington. The Johnsons divorced in 1911, and Eric's mother, Ida, changed her and her son's last name to "Johnston."

He attended the University of Washington, where he joined the Theta Delta Chi fraternity and graduated in 1917. During this time, he worked as a stevedore, newspaper sports columnist, library clerk, and shoe salesman.

When the United States entered World War I, Johnston enlisted in the United States Marine Corps. He was commissioned a second lieutenant, and became a Reserve Officers' Training Corps commander at the University of Washington in 1918. He was promoted to captain, fought with the American Expeditionary Force, Siberia in the Russian Revolution, and was named military attaché in Peking (now Beijing). Johnston acquired some Mandarin, traveled widely in Asia, and successfully speculated in Chinese currency.

While in Beijing, Johnston was assaulted by an unknown person. His skull was fractured, which led to sinus infections and lung ailments and his discharge from the Corps in 1922 for medical reasons. Johnston returned to Spokane for its dry climate, where he married his long-time girlfriend, Ina Hughes. He became a vacuum-cleaner salesman, and bought the Power Brown Co., the Pacific Northwest's largest independent appliance distribution business. In 1924, the newly renamed Brown-Johnston Company purchased the Doerr-Mitchell Electric Co., a manufacturer of electrical appliances, ironwork and glassware.

Johnston was elected president of the Spokane Chamber of Commerce in 1931. He became managing trustee of the bankrupt Washington Brick and Lime Co., led it out of bankruptcy, and became its chairman. Johnston also became president of the Wayne-Burnaby Company, a regional electrical contractor.

As a rising regional businessman, Johnston became active in the national Chamber of Commerce. He was appointed to its tax committee in 1933, elected a director in 1934, and elected vice president in 1941. Johnston became head of the U.S. Chamber of Commerce after a revolt by younger, moderate business executives pushed several older, conservative candidates aside. He refused to antagonize the American Federation of Labor or the Congress of Industrial Organizations, and advocated labor-management cooperation. Johnston persuaded the labor federations to make a no-strike pledge during World War II.

In 1940, Johnston ran in the Republican primary for Senator from Washington state, but placed a distant second place with only 18 percent of the vote.