1940 United States presidential election in Oklahoma

The 1940 United States presidential election was the 39th quadrennial presidential election. It was held on Tuesday, November 5, 1940. Incumbent Democratic President Franklin D. Roosevelt defeated Republican businessman Wendell Willkie to be reelected for an unprecedented third term in office.

The United States Electoral College is the group of presidential electors required by the Constitution to form every four years for the sole purpose of appointing the president and vice president. Each state and the District of Columbia appoints electors pursuant to the methods described by its legislature, equal in number to its congressional delegation. Federal office holders, including senators and representatives, cannot be electors. Of the current 538 electors, an absolute majority of 270 or more electoral votes is required to elect the president and vice president. If no candidate achieves an absolute majority there, a contingent election is held by the House of Representatives to elect the president and by the Senate to elect the vice president.

The president of the United States (POTUS) is the head of state and head of government of the United States of America. The president directs the executive branch of the federal government and is the commander-in-chief of the United States Armed Forces.

Oklahoma is a state in the South Central region of the United States, bordered by Texas on the south and west, Kansas on the north, Missouri on the northeast, Arkansas on the east, New Mexico on the west, and Colorado on the northwest. Partially in the western extreme of the Upland South, it is the 20th-most extensive and the 28th-most populous of the 50 United States. Its residents are known as Oklahomans and its capital and largest city is Oklahoma City.

Franklin Delano Roosevelt, commonly known as FDR, was an American statesman and political leader who served as the 32nd president of the United States from 1933 until his death in 1945. He previously served as the 44th governor of New York from 1929 to 1933, the Assistant Secretary of the Navy from 1913 to 1920, and a member of the New York State Senate from 1911 to 1913.

The Democratic Party is one of two major contemporary political parties in the United States. Founded in 1828, it was predominantly built by Martin Van Buren, who assembled politicians in every state behind war hero Andrew Jackson, making it the world's oldest active political party. Its main political rival has been the Republican Party since the 1850s, with both parties being big tents of competing and often opposing viewpoints. Modern American liberalism — a variant of social liberalism — is the party's majority ideology. The party also has notable centrist, social democratic, and left-libertarian factions.

New York, often called New York state, is a state in the Northeastern United States. With 20.2 million people enumerated at the 2020 United States census, its highest decennial count ever, it is the fourth-most populous state in the United States as of 2021. Approximately 44% of the state's population lives in New York City, including 25% in the boroughs of Brooklyn and Queens; and 15% of the state's population is on the remainder of Long Island, the most populous island in the United States. With a total area of 54,556 square miles (141,300 km2), New York is the 27th-largest U.S. state by area. The state is bordered by New Jersey and Pennsylvania to its south, and Connecticut, Massachusetts, and Vermont to its east; it shares a maritime border with Rhode Island, east of Long Island; and an international border with the Canadian provinces of Quebec to its north and Ontario to its northwest.

Henry Agard Wallace was an American politician, journalist, farmer, and businessman who served as the 33rd vice president of the United States under President Franklin D. Roosevelt. He served as the 11th U.S. Secretary of Agriculture and the 10th U.S. Secretary of Commerce. He was the nominee of the new Progressive Party in the 1948 presidential election.

The Republican Party, also referred to as the GOP, is one of the two major contemporary political parties in the United States. The GOP was founded in 1854 by anti-slavery activists who opposed the Kansas–Nebraska Act, which allowed for the potential expansion of chattel slavery into the western territories. It has been the main political rival of the Democratic Party since the mid-1850s. Like them, the Republican Party is a big tent of competing and often opposing ideologies. Presently, the Republican Party contains prominent conservative, centrist, populist, and right-libertarian factions.

The positions of majority leader and minority leader are held by two United States senators and members of the party leadership of the United States Senate. They serve as the chief spokespersons for their respective political parties holding the majority and the minority in the United States Senate. They are each elected as majority leader and minority leader by the senators of their party caucuses: the Senate Democratic Caucus and the Senate Republican Conference.

Charles Linza McNary was an American Republican politician from Oregon. He served in the U.S. Senate from 1917 to 1944 and was Senate Minority Leader from 1933 to 1944. In the Senate, McNary helped to pass legislation that led to the construction of Bonneville Dam on the Columbia River, and worked on agricultural and forestry issues. He also supported many of the New Deal programs at the beginning of the Great Depression. Until Mark Hatfield surpassed his mark in 1993, he was Oregon's longest-serving senator.