Ms. vs. Mrs. – What's the Difference?
Ms. is the equivalent of the male Mr. Just as Mr. can be used for both married and unmarried men, Ms. can be used for both married and unmarried women. Ms. should also be followed by the person's surname, like Ms. Frizzle. It is important to note, however, that Ms. is not the same as Miss, which is a title for a young, unmarried woman.