The 12th Mississippi Legislature met in Jackson from January 5, 1829 to February 6, 1829.

Senate As the incumbent lieutenant governor, A. M. Scott served as the ex officio President of the Senate. Non-senators David Gordon and Joseph Pearce were elected Clerk and Door-Keeper respectively. County District Senator NameAdamsFountain WinstonWilkinsonJoseph JohnsonPike, MarionWiley P. HarrisJackson, Hancock, Green, PerryJohn McLeodAmite, FranklinWillie JacksonMonroeJames F. TrotterClaiborneThomas FreelandCopiah, JeffersonJohn L. IrwinWayne, Covington, JonesHamilton CooperLawrence, SimpsonJoseph CooperHinds, Rankin, Madison, Yazoo, Washington, WarrenHenry W. Vick

House William L. Sharkey was elected Speaker, defeating David Cleveland in a 19-16 vote. James Cornell was elected Clerk of the House. Dillard Collins was elected Door-Keeper. County Representative NameAdamsCharles B. GreenDuncan S. WalkerAmiteSamuel B. MarshFrancis GravesClaiborneParmenas BriscoeThomas GaleCopiahWilliam N. MillerBenjamin KennedyCovingtonJohn ColbertFranklinDavid D. GibsonLewis MageeGreenArchibald McMannusHancockP. Rutullius R. PrayHindsJohn B. PeytonJacksonThomas BilboJeffersonNathan L. BouldenPhilip DixonJonesSamuel EllisLawrenceWalter W. NewA. M. KeganMarionDavid FordMadisonJames R. MarshMonroeRobert EdringtonDaniel W. WrightSamuel RagsdalePerryAbner CarterPikeDavid ClevelandRichard DavidsonRankinAlexander ChisholmSimpsonFranklin E. PlummerWarrenWilliam L. SharkeyWashingtonP. A. GilbertWayneJohn H. HorneWilkinsonM. F. DegraffenreidJacob ChambersYazooRichard Sparks

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