Demand amounted to RON672.8 million.
Romania last sold February 2029 bonds in June at an average yield of 4.76%.
The finance ministry seeks to raise RON4.2 billion selling state paper on the local market in July.
Romania's finance ministry on Monday sold a planned 500 million lei (EUR105.6 million) selling bonds maturing in February 2029 at an average yield of 4.63%, central bank data showed.