Mississippi Code Title 11. Civil Practice and Procedure § 11-9-1

Whenever under any statute a writ is made returnable to, or the institution of any suit or proceeding is required to be in, a justice court, general or special, or a circuit or chancery court, or when in respect to such matters any justice court judge, or clerk, or judge or chancellor, or other officer, is empowered to do any act in or about any of said courts, the said writs may be made returnable to the county court in any cause or matter there pending or which, within its jurisdiction, is there to be instituted, and all the said acts of the officers aforesaid may be done in behalf of or in respect to the county court in all such matters and causes to the same extent as had the county court been expressly included in each and every of such statutes first aforementioned.