Vietcombank sold the greenback at VND25,460, up 0.02% from Monday.
The State Bank of Vietnam raised its rate by 0.02% to VND24,257.
Unofficial exchange points sold the greenback at VND25,730, up 0.04%.
The dollar has risen 4.17% against the dong since the beginning of the year.
Globally the dollar and yen kept within close ranges on Tuesday as traders awaited a barrage of key central bank decisions, kicking off with midweek monetary policy meetings from the Bank of Japan and Federal Reserve, Reuters reported.
The Japanese currency was taking a breather from its recent rally as the BOJ began its two-day meeting on Tuesday, having surged over 2% against the dollar last week.
The greenback was last 0.12% higher, fetching 154.205 against the yen.
The dollar index, which measures the currency against a basket of peers, was little changed at 104.64.