PacifiCorp is an electric power company in the northwestern United States.

PacifiCorp has three primary subsidiaries:

Since 2006, PacifiCorp has been a wholly owned subsidiary of MidAmerican Energy Holdings Company, itself an affiliate of Berkshire Hathaway. In 2001, PacifiCorp was purchased by Scottish Power, but later sold to MidAmerican.

PacifiCorp is currently headquartered in the Lloyd Center Tower at 825 N.E. Multnomah Street, Portland, Oregon, in the Lloyd District. Pacific Power is also headquartered in the same building. Rocky Mountain Power and PacifiCorp Energy are headquartered in Salt Lake City, Utah.

Pacific Power and Rocky Mountain Power combined serve over 1.4 million residential customers, 202,000 commercial customers, and 34,000 industrial and irrigation customers - for a total of approximately 1,668,000 customers. The service area is 136,000 square miles (350,000 km²). Pacific Power and Rocky Mountain Power own and maintain 15,622 miles (25,141 km) of long distance transmission lines, 43,850 miles (70,570 km) of overhead distribution lines, 14,510 miles (23,350 km) of underground distribution lines, and 900 substations.