In July 2014, the seasonally adjusted jobless rate also stood at 6.8%.
An estimated 630,000 people were unemployed from 627,000 in June and the figure remains unchanged compared with from July 2014, the statistics institute said.
Unemployment among men stood at 7.8%, while the rate stood at 5.6% among women.
The figures refer to people aged between 15 and 74 and are based on the definition recommended by the International Labor Organization.