BA (or similar) may refer to:

• Bachelor of Arts
• Bashkir language's ISO 639 alpha-2 language code
• Bathroom, in real estate advertising
• Beerenauslese, German late-harvest wine

.ba is the Internet country code top-level domain (ccTLD) for Bosnia and Herzegovina. It is administered by the University Teleinformation Center.

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Ba, Bâ and Bah are potentially related West African surnames. Notable people who share these surnames are listed below separately for each surname along with information relevant to the geographic and historical distribution of the surnames.

Mrs or Mrs. (Standard English pronunciation ) is a commonly used English honorific used for women, usually for those who are married and who do not instead use another title, such as Dr, Lady, or Dame. In most Commonwealth countries, a full stop (period) is not used with the title. In the United States and Canada a period is used (see Abbreviation).