Governments around the world made nearly 21,000 requests for access to Google data in the first six months of this year, according to the search engine.
Its Transparency Report indicates government surveillance of online lives is rising sharply.
The US government made the most demands, asking for details 7,969 times in the first six months of 2012.
Turkey topped the list for requests to remove content.
Google, in common with other technology and communication companies, regularly receives requests from government agencies and courts around the world to have access to content.
It has been publishing its Transparency Report twice a year since 2009 and has seen a steady rise in government demands for data. In its first report in 2009, it received 12,539 requests. The latest figure stands at 20,939.