Frederick Douglass (chhut-sì hō Frederick Augustus Washington Bailey; iok 1818 nî 2 goeh – 1895 nî 2 goe̍h 20) sī Hui-chiu-hē Bí-kok-lâng siā-hōe kái-kek-chiá, hòe-tû lô͘-lē ūn-tōng-chiá, kiam chok-ka. I tāi-seng sī tī Maryland thô chhut lō͘-lê seng-oa̍h, liáu-āu chiâⁿ chò choân-kok ê hòe-tû lô͘-lē ūn-tōng thâu-lâng.