Cooking gas prices rose on Thursday in Ho Chi Minh City and other southern localities, with a 12-liter cylinder now costing VND438,000 (US$17.78), 3.06% higher than before.
This is the second increase since November after prices fell for six months in a row from May.
Global rates have gone up by 1.56% to $650 per ton as demand for heating surges amid winter, according to local distributor Saigon Petro.
In Vietnam, domestic supply meets only around 60% of the demand, which means prices are partially dependent on global rates.