Miss. Code Ann. § 19-1-97

Montgomery County is bounded by beginning on the southern boundary of Grenada County where it crosses the northwest corner of section twenty-one, township twenty-one, range five, east; thence south along section lines to the northwest corner of section twenty-one, township eighteen, range five, east; thence along section lines to the range line between ranges five and six, east; thence south one mile; thence east to the northeast corner of section twenty-seven, township eighteen, range six, east; thence south to the southwest corner of section thirty-five, township seventeen, range six, east; thence west to the Big Black River, and along it, by its meanderings, to the point at which the line between townships sixteen and seventeen crosses said river, thence east on the line of Attala County to the southeast corner of section thirty-three, township seventeen, range eight, east; thence north on section lines to where Big Black River crosses the line between sections fifteen and sixteen, township eighteen, range eight, east; thence up said river to where the township line between townships eighteen and nineteen crosses it; thence west to the northwest corner of township eighteen, range eight, east; thence north to Grenada County; thence to the beginning. The county site is Winona.