ENC (formerly El Dorado National–California, after which the company's name is derived) is an American manufacturer of heavy-duty transit buses with its headquarters and main factory in Riverside, California, and owned by Rivaz Inc.

The combined El Dorado National became one of the leading suppliers of light-duty and mid-size buses for the airport/hotel/rental car shuttle bus markets and local transit operators with smaller fleets.

[2][3] National Coach was founded in 1975 by William Feldman and Thomas Hollenbeck in Gardena, California, later expanding with a second factory in Chino in 1984,[4] and a third facility in Carson.

To enable the new production and bring all of its workers under one roof, ENC broke ground in June 2003 on a new manufacturing site in Riverside, California, more than doubling factory floor space to 200,000 sq ft (19,000 m2).

[17] In January 2024, REV Group announced that it planned to wind down operations at ENC, cited difficulty with suppliers and an extremely competitive market for transit buses as its reason for exiting the business.