Usulután Koān
(Tùi Usulután Koān (El Salvador) choán--lâi)
Usulután Koān (Se-pan-gâ-gí: Departamento de Usulután) sī El Salvador ê chi̍t ê koān.
| Usulután Koān Departamento de Usulután |
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| — Koān — | |||
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| Kok-ka |  El Salvador
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| Siú-hú | Usulután | ||
| Bīn-chek | |||
| - Lóng-chóng | 2,130.4 km2 | ||
| Jîn-kháu | |||
| - Lóng-chóng | 464,883 lâng | ||
| Sî-khu | CST (UTC−6) | ||
