List of companies based in Hayward, California

[1] Hayward has a large number of manufacturing businesses and corporate headquarters, including high-tech companies, and is considered part of a northern extension of Silicon Valley.

The economy of Hayward in the first half of the twentieth century was based largely on the Hunt Brothers Cannery.

It was opened in Hayward in 1895 by brothers William and Joseph Hunt, who were fruit packers originally from Sebastopol, California.

[54] The Hunts initially packed local fruit, including cherries, peaches, and apricots, then added tomatoes, which became the mainstay of their business.

At its height in the 1960s and 1970s, Hunt's operated three canneries in Hayward, at A, B, and C Streets; an adjacent can-making company; a pickling factory; and a glass manufacturing plant.