Christopher Edward Berkeley Portman, 10th Viscount Portman (born 30 July 1958) is a British peer and property developer.

Viscount Portman and family ranked 33rd in the Sunday Times Rich List 2005

Sunday Times Rich List 2005

The Sunday Times Rich List 2005 was published in April 2005.Since 1989 the UK national Sunday newspaper The Sunday Times has published an annual magazine supplement to the newspaper called the Sunday Times Rich List...

 and 40th in the 2006 list, with an estimated personal fortune of £1,200m. His fortune comes from his 110 acre (0.4451546 km²) central London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 inheritance, called the Portman estate, which is spending £40 million on an investment programme that includes the development of a shopping area, Portman Village. Portman's other assets include shares in commercial properties in New York

New York

New York is a state in the Northeastern region of the United States. It is the nation's third most populous state. New York is bordered by New Jersey and Pennsylvania to the south, and by Connecticut, Massachusetts and Vermont to the east...

 and Florida

Florida

Florida is a state in the southeastern United States, located on the nation's Atlantic and Gulf coasts. It is bordered to the west by the Gulf of Mexico, to the north by Alabama and Georgia and to the east by the Atlantic Ocean. With a population of 18,801,310 as measured by the 2010 census, it...

.

Portman's half-brother is the Hon. Justin Trevor Berkeley Portman.