Cognomen Sá (سا 
, Sá 
, Så 
, and others...) , around the globe, is a common last name. The cognomen Sá is habitual in Portugal, where it is quite a common surname, Guinea-Bissau, and Angola, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in Portugal, Angola, and Brazil. Also, Sá is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| سا | Saudi Arabia, Iraq, Algeria, Egypt, Sudan |
| Sá | Portugal, Brazil, Algeria, Egypt, Angola |
| Så | Myanmar, Tunisia, Morocco, Algeria, Egypt |
| サ | Japan |
| Са | Russia, China, Kazakhstan, Armenia, Ukraine |
| rodrigo anes de sá (b. 1320) |
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| joão rodrigues de sá, o das galés Portuguese diplomat, PT (b. 1355) |
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estácio de sá Portuguese soldier; first Governor of Rio de Janeiro, PT (b. 1520) |
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| mem de sá Brazilian politician, PT (b. 1500) |
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| beatriz de sá (b. 1500) |
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| manoel de sá Portuguese theologist, PT (b. 1530) |
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| leonardo fernandes de sá Roman Catholic bishop, PT (b. 1550) |
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salvador de sá Portuguese soldier and politician, PT (b. 1602) |
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| martim correia de sá (b. 1575) |
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| antónio de sá (b. 1620) |
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| diogo correia de sá Portuguese poet, PT (b. 1669) |
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| jerónimo sá (b. 1659) |
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| joão antónio de sá pereira Portuguese nobleman and colonial administrator, PT (b. 1719) |
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josé de vasconcelos e sá PT (b. 1775) |
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| joaquim josé da costa e sá (b. 1740) |
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