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Use "Ms." as the default title for women, "Mr." for men, and "Mx." when someone uses a gender-neutral title. For a married couple with the same surname, write "Mr. and Mrs. Rivera" in traditional style or "Alex and Sam Rivera" in modern style. Matching the title to how the person actually introduces themselves matters more than any rule.
| Title | Use it when | Example |
|---|---|---|
| Mr. | Any adult man, married or not | Mr. Daniel Okafor |
| Ms. | Any adult woman, unless she prefers otherwise | Ms. Priya Raman |
| Mrs. | A married woman who uses her married name and prefers "Mrs." | Mrs. Laura Bennett |
| Miss | An unmarried woman or girl who prefers it; increasingly rare for adults | Miss Emily Carter |
| Mx. | Someone who uses a gender-neutral title | Mx. Jordan Ellis |
| Dr. | Anyone with a doctorate or medical degree; outranks Mr./Ms. | Dr. Amara Singh |
"Ms." is the safe default for adult women because, unlike "Mrs." and "Miss", it doesn't announce marital status. "Mrs." is not the more formal or more respectful option; it's simply the married-name option, and using it for a woman who goes by "Ms." reads as presumptuous. When in doubt, check how the person signs their own emails or how their company lists them. And "Dr." beats Mr./Ms./Mrs. every time for someone who holds a doctorate: demoting a professor to "Ms." in writing is a fast way to annoy them.
For a married couple sharing a surname, the traditional form is "Mr. and Mrs. Daniel Okafor." Notice what happens there: the wife's first name disappears entirely. Many people now prefer the modern form, "Daniel and Priya Okafor," which names both people. Neither is wrong, but the traditional version can irritate the exact recipient you're trying to impress, so when the couple is contemporary, go modern.
When the couple has different surnames, list both full names: "Mr. Daniel Okafor and Ms. Priya Raman." Convention puts them in alphabetical order by surname, unless you know one of them much better, in which case the person you're closer to goes first. For an unmarried couple living together, the same both-names format works; a single line is fine if it fits, and two lines are fine if it doesn't. Never combine different surnames into one shared title like "Mr. and Mrs. Okafor-Raman": titles attach to people, not to lines.
"Mx." (pronounced "mix") is the gender-neutral counterpart to Mr./Ms., used by people who don't identify within the binary titles. On an envelope it's simple: "Mx. Jordan Ellis" on the name line, exactly where Mr. or Ms. would go. It needs no period debate and no explanation.
A few more that come up. A widow keeps whatever title she used before; there's no rule that moves a widowed "Mrs." to "Ms.", and many widows strongly prefer to keep "Mrs." A divorced woman may revert to "Ms." with her maiden name or keep her married name: follow her lead. For clergy, use "Rev." for most ministers, "Father" for Catholic priests, and "Rabbi" for rabbis. And a practical sorting-equipment note: USPS reads titles and periods just fine either way, so punctuate titles the way you'd write them in a letter; the machines care about the address lines below the name, not the honorific above them.
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