Police officers detected and detained 156 fewer motorists compared to the previous year's operation.
This figure includes motorists who were unfit to drive, or who were unable or refused to give a sample.
During the operation, police stopped over 4,000 drivers for preliminary breath tests.
Just over 6,000 motorists were stopped in the 2011/2012 winter season when 429 drink drivers were detected by PSNI.
Head of Operations Branch, Superintendent Mark Purdon said it was disappointing that so many still took the risk of killing or injuring themselves or others.
"These 273 people across Northern Ireland have begun 2013 with the prospect of going to court where they will almost certainly lose their driving licence," he said.
"They should count themselves lucky. They could have lost their own life or destroyed the lives of others had police not stopped them.
"Our aim with this and every road safety initiative is to save lives and reduce injuries, which is why we ran operations day and night throughout the festive season and not just during the weekends or key dates."
He continued: "While we welcome the fact that the vast majority of right thinking people realise that drink driving is shameful and unacceptable, clearly there is still an irresponsible minority who ignore all advice and warnings."
Supt Purdon added that the detection of drink driving will remain a year-round priority for police.