Miss. Code Ann. § 51-31-23

Where the land to be included in a proposed drainage district lies wholly within one county or a judicial district of a county, the petition for the organization of the district shall be filed in the chancery court of such county or judicial district. Where the lands to be included in such proposed drainage district lie in two or more districts or counties in this state, the petition shall be filed in the chancery court of the county or judicial district in which the greatest or greater number of acres of land to be included lie. Such chancery court or the chancellor thereof shall have jurisdiction of the entire drainage district, whether all of the proposed lands of the drainage district lie within the chancery court district, or a part of the lands lie outside thereof.