Arthur Jay Lacy (September 30, 1876 – April 6, 1975) was an American politician, lawyer, and philanthropist.

[1] In 1909, Lacy was invited by Henry Ford's lawyer, Alfred Lucking, to practice law in Detroit.

In 1913, Lacy was appointed as judge of the then-new Detroit Domestic Relations Court by Michigan Governor Woodbridge N. Ferris.

[4] In 1926, Lacy unsuccessfully ran in the Democratic primary for the Michigan Senate seat representing the 18th district.

[1] In 1930, Lacy would being a personal campaign against heavy taxation and high governmental costs during the Great Depression, which would gain him prominence in the Democratic Party.

[2] In 1933, Lacy served as a delegate to the Michigan convention to ratify the 21st Amendment to the United States Constitution, where he represented the Wayne County 1st district.

On September 11, 1934, Lacy won the primary, defeating incumbent Democratic Governor William Comstock.

[2][5] In the general election, on November 6, 1934, Lacy was defeated by Republican nominee Frank Fitzgerald.

Lacy disagreed with many of Democratic President Franklin D. Roosevelt's policies, such as deficit spending and attempted court packing.