Miss. Code Ann. § 19-1-109

Pearl River County is bounded by beginning at a point on the state line in Pearl River where the thirty-first parallel of latitude crosses said river and running east along said parallel to the southeast corner of township one, north, range sixteen, west; thence north one mile to the line which was the north boundary line of Pearl River County prior to the adoption of the Code of 1930; thence east, parallel with the thirty-first degree of latitude, to the section line between twenty-seven and twenty-eight, township one, north, range fifteen, west; thence south to the said thirty-first parallel of latitude; thence east to the northeast corner of section three, township one, south, range fifteen, west; thence south to the southeast corner of section three, township one, south, range fifteen, west; thence east along section lines to the section corner common to sections five, six, seven, and eight in township one, south, range fourteen, west; thence north to said thirty-first parallel of latitude; thence east one-half mile to the center of section thirty-two of township one, north, range fourteen, west; thence north on half-section line of said section thirty-two to the south line of section twenty-nine; thence east along section lines to the range line between ranges thirteen and fourteen, west; thence south to the said thirty-first parallel of latitude, which point is the southeast corner of section thirty-six, township one, north, range fourteen, west; thence east along the said thirty-first parallel of latitude to the northeast corner of section one, township one, south, range fourteen, west; thence south on the range line to the southeast corner of township four, south, range fourteen, west; thence west to the southeast corner of township four, south, range sixteen, west; thence south on the range line nine miles to the southeast corner of section thirteen, township six, south, range sixteen, west; thence west to the northeast corner of section twenty-one, township six, south, range sixteen, west; thence south to the southeast corner of said section twenty-one, township six, south, range sixteen, west; thence west to the northwest corner of section thirty, township six, south, range sixteen, west; thence along range line between ranges sixteen and seventeen to the southeast corner of section one, township seven, south, range seventeen, west; thence west to Pearl River; thence north along the middle of said river to the point of beginning. The county site is Poplarville.