Dona may refer to:

• Feminine form for don (honorific) (Spanish: doña, Portuguese: dona), a Spanish, Portuguese, southern Italian, and Filipino title, given as a mark of respect
• Feminine form for dom (title), titled nobility in Portugal and Brazil, and in English for certain Benedictine and Carthusian monks

Don (, , ) from Latin dominus, (roughly, "Lord") is an honorific title used in Spain, Portugal, Italy, the Americas and the Philippines. The female equivalent is doña , donna , and dona , abbreviated "Dª" or simply "D."