Demand amounted to little over RON1 billion.
Romania last sold September 2031 bonds in February at an average yield of 4.5%.
The government plans to raise around RON5 billion selling state paper on the local market in March.
Romania's finance ministry on Monday raised 815.3 million lei (EUR169.5 million), versus a RON700 million target, selling bonds maturing in September 2031 at an average yield of 4.32%, central bank data showed.