Both Twitter and Facebook beat previous marks of activity for sporting events.
A total of 35.6 million tweets were sent during the match on Tuesday that saw the Germans send the host nation to their worst loss in their 100-year footballing history.
The previous mark was set at the Super Bowl in February, which saw nearly 25 million comments unfurl on Twitter, the social network told AFP.
Facebook, meanwhile, saw more than 200 million posts, shares, comments and likes during the match, involving some 66 million people - a new record.
On both platforms, the fifth German goal by Sami Khedira just 29 minutes into the match sparked the most comments and reactions.
A record 32.6 million TV viewers in Germany watched the game, a specialist media site said Wednesday.
The spectacular match, which saw Germany reach Sunday's World Cup
final, was broadcast on ZDF public TV from 10.00pm local time in the country of about 80 million people.
The audience figure topped the previous record set in 2010 when 31.1 million fans watched Germany lose to Spain in the World Cup semi-final in South Africa, said the Meedia site.
PHOTO GALLERY: brazil">Fans celebrate Germany's victory
Sporting records smashed
The game was Brazil's equal-heaviest defeat, heaviest defeat on home soil, heaviest World Cup defeat and the most goals conceded by Brazil at a World Cup.
Football giants Brazil also now hold the record for the biggest defeat for a World Cup host nation and equalled the record for the most goals conceded by a World Cup host nation in a single game.
Germany, however, claimed the record for the biggest ever World Cup semi-final win.