Unofficial exchange points sold the greenback at VND24,260, up 0.25% from Friday.
Vietcombank maintained it at VND24,260.
The State Bank of Vietnam kept its reference rate stable at VND23,959.
The dollar has increased against the dong by 2.23% since the beginning of the year.
Globally the U.S. dollar was lower on Friday, after data showing a dip in consumer sentiment, but the greenback was still poised for a ninth straight week of gains, while the yen weakened to a 10-month low, Reuters reported.
The U.S. dollar index was down 0.08% at 105.32, but was still poised for its ninth straight weekly gain, which would mark its longest weekly run since a 12-week streak of gains in 2014.
The greenback continued to strengthen against the yen, after the Japanese currency had a sharp move higher versus the dollar earlier in the week. The dollar was last up 0.25% at 147.84 yen after hitting a 10-month high of 147.96.