Okcheon Khiun ( Hon-koet-ngi : 沃川郡/沃川郡 ) he Hon-koet Chungcheong Pet-tho ke yit-chak khiun . Chung mien-chit 537.13 phin-fong kung-li , 2004-ngien ngin-khieu tha?t-to 56,634-ngin.