Unofficial exchange points sold the greenback at VND26,550, up 0.19% from Friday.
Vietcombank maintained its rate at VND26,110.
The State Bank of Vietnam’s reference rate was steady at VND24,960.
The dollar has risen 3.91% against the dong since the beginning of the year.
Globally the dollar strengthened on Friday after the latest round of economic data showed a rebound in import prices while consumer sentiment remained subdued as tariff worries jumped, putting it on pace for a fourth straight weekly advance, Reuters reported.
The greenback began the week with a surge of more than 1% on Monday after the United States and China announced a 90-day pause on most of the tariffs imposed on each other's goods since early April, easing fears of a global recession, but had been trending lower throughout the week in part due to tepid economic data.
The dollar index, which measures the greenback against a basket of currencies, rose 0.36% to 101.13, with the euro down 0.37% at $1.1146.