It said 2,865 Britons took German citizenship in 2016 - a 365 per cent increase.
Brexit Secretary David Davis said British Prime Minister Theresa May was not sobbing over last week's failed election gamble when he met her after the vote, Davis said on Monday. And since it takes several months to complete the application process, Brits who applied after the Brexit referendum last June may not get their passports until this year, suggesting another big jump in naturalizations in 2017.
Britons were, however, still a relatively small group.
In total, 2,865 Britons took German citizenship a year ago, the office said.
The second largest group was from Poland, with 6,632. That uncertainty over the future status of British nationals living and working in other European Union countries has been increased by Theresa May's election debacle that cost her party its majority and left her weakened just days before Brexit talks are due to begin.
According to the statistics presented, on average naturalized citizens were 33 years of age and had resided in Germany for 17 years.
Anyone who has lived in Germany for eight years or has been married to a German for six years is eligible for citizenship.