Both Mrs and Ms are translated to “κυρία”. Κυρία is a way to address a married woman. It is also used to address a woman with respect if we are not very familiar with her or in formal speech, regardless of her marital status.
Δεσποινίς is used for young unmarried women. It would be very uncommon if an older unmarried woman insisted to be called like this. It would sound like a joke.
Here are the abbreviations:
Mr = Κος
Miss = Διδα or Δις
Mrs = Κα
Ms = Κα
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.