Bids amounted to RON306.7 million.
Romania last sold September 2031 bonds in September at an average yield of 5.28%.
The finance ministry plans to raise RON4.74 billion selling state paper in November.
Romania's finance ministry on Thursday raised a planned 200 million lei (EUR42.8 million) selling treasury bonds maturing September 2031 at an average yield of 5.46%, central bank data showed.