The state visit to the UK of President George W Bush saw a rise in reported street robberies of 20% in London.
Police worked 14,000 shifts over the three-day visit
Scotland Yard said reports of muggings rose from the average rate of 150 a day to 180 over the three days.
Hundreds of police officers were moved from their regular work to help provide security for the visit.
More than 5,000 officers were on duty on the day of the protest march when more than 100,000 people demonstrated through the heart of the city.
Scotland Yard said the worst affected boroughs were Hammersmith, Hackney, Islington, Newham and Lambeth.
A spokesman said the trend may continue for a week after the visit because of officers' shifts being rescheduled and because of the time lag on investigating the alleged crimes.
Commander John Yates told the Times there was no evidence of a rise in crimes such as burglary or car crime.
"Street crime is the one that benefits from high-visibility policing and good covert tactics.
"It's not a dramatic effect but we have seen it every time we have a major event in the capital."