Mechanics Monument, Bronze monument at Market Street intersection, San Francisco, United States.

Mechanics Monument is a bronze sculpture at the intersection of Market, Battery, and Bush Streets in San Francisco. Five workers operating a punch press are depicted in lifesize scale, showing the physical strength required for metalworking and industrial production.

Douglas Tilden created the monument in 1901 to honor Peter Donahue, founder of the Union Iron Works in San Francisco. The foundry was one of the city's largest employers and played a key role in its industrial growth during the 1800s.

At the foot of the sculpture lie objects symbolising Peter Donahue's trades: an anvil for foundries, a ship's propeller for shipping and a wheel with connecting rod for the railways. The monument was nicknamed "Donahue's pump" soon after its unveiling.

The monument stands in Mechanics Monument Plaza, a small green space at the crossing of Market, Battery and Bush Streets, with Central Plaza across Market Street to the southeast. It is a street-level sculpture on a granite base, so it can be walked around and viewed from all sides.

At the 1901 unveiling, the near-naked figures, especially their lack of trousers, caused an outcry, and some demanded that trousers be added afterwards; the request was not followed. The monument survived the 1906 earthquake. Tilden's idea came during a walk on Mission Street, when he passed a machine workshop and saw a muscular, sweating worker operating a punch.