What is the translation of "Mr" and "Mrs" in Vietnamese?

There are a few ways to say Mr. and Mrs. in vietnamese...

if they were the elderly, you would call them Ông Smith=Mr. Smith and Bà Smith= Mrs. Smith (just like what nazeefa said.)

If they are older than your dad and not considered old enough to be an elderly...Bác=Mr. and Thim=Mrs.

if they're younger than your parents, you can call them Chú=Mr. and Thim(same as above) or Cô=Mrs. ......You can use them seperately or together like Chú and Thim/Cô Smith for Mr. and Mrs.Smith.

you can also use Caû for Mr. and use that by itself. the Mrs for this pair is Mð must be used with Caû and never alone.

Also if you're related to them you can call them all of the above and if they are on ur mom's side and is smaller than ur mom and dad, you can call them Dí= mrs. and dúóng (with a dot under the ó, i couldn't figure how to do that.^^"

i hope this helps and isn't as confusing

Mrs Vietnam

Mr. = Ông (Ông Smith)

Mrs. = Bà (Bà Smith)