Laura Kovesi Codruta, who heads the country's anti-graft agency, said three ministers, 17 lawmakers, 16 magistrates and 20 state company officials were among high-level cases targeted by the agency last year.
Kovesi, presenting the agency's annual report to senior judges, prosecutors and magistrates at the ornate National Military Circle in downtown Bucharest, said prosecutors need predictable laws to do their job.
Last month, the government issued a highly contentious decree that would have decriminalized official misconduct, sparking weeks of massive anti-graft protests. Premier Sorin Grindeanu eventually canceled the measure.
President Klaus Iohannis called Romania's anti-corruption drive, praised by Western allies, "necessary.... If we want a modern state," adding "at the beginning of this year... (it) was really put to the test."
"Romania is not only a model of good practice, but a source of inspiration for citizens of other countries to publicly show they refuse to accept acts of corruption," Iohannis said.