Seiko Epson Corporation (セイコーエプソン株式会社, Seikō Epuson Kabushiki-gaisha^?), commonly known as Epson, is a Japanese technology company and one of the world's largest manufacturers of computer printers, information and imaging related equipment. Headquartered in Suwa, Nagano, Japan, the company has numerous subsidiaries worldwide and manufactures inkjet, dot matrix and laser printers, scanners, desktop computers, business, multimedia and home theatre projectors, large home theatre televisions, robots and industrial automation equipment, point of sale docket printers and cash registers, laptops, integrated circuits, LCD components and other associated electronic components. It is one of three core companies of the Seiko Group, a name traditionally known for manufacturing Seiko timepieces since its founding.

Epson is best known for its "Micro Piezo" piezoelectric printing technology and "3LCD" LCD projection technology brand names.

The roots of Seiko Epson Corporation started with a company called Daiwa Kogyo, Ltd. that was founded in 1942 by Hisao Yamazaki, a local clock shop owner and former employee of K. Hattori, in Suwa, Nagano, Japan. Daiwa Kogyo was supported by an investment from the Hattori family (founder of the Seiko Group) and began as a manufacturer of watch parts for Daini Seikosha (currently Seiko Instruments). The company started operation in a 2,500-square-foot (230 m²) renovated miso storehouse with 22 employees.