Choctaw County is bounded by beginning at the northeast corner of section twelve, township nineteen, range eleven, east; thence west on section lines to a point where said section line crosses Big Black River; thence down said river by the middle of the stream to where it crosses the line between sections fifteen and sixteen, township eighteen, range eight, east; thence south on said section line to the southwest corner of section thirty-four, township seventeen, range eight, east; thence east on the township line between townships sixteen and seventeen to the northeast corner of township sixteen, range nine, east; thence south on the range line between ranges nine and ten to the southwest corner of township fifteen, range ten, east; thence east on the township line between townships fourteen and fifteen to the southeast corner of township fifteen, range ten, east; thence north on the range line between ranges ten and eleven to the northeast corner of said township fifteen, range ten; thence east to the southeast corner of township sixteen, range eleven, east; thence north on the range line to the northeast corner of said township sixteen, range eleven, east; thence east to the southwest corner of Oktibbeha County-southwest corner of township seventeen, range twelve, east; thence north with the boundary line of Oktibbeha county to the beginning. The county site is Ackerman.