After the war, Ransom moved to Weldon, North Carolina, in 1866 where he was a planter and lawyer. In 1872, he was elected as a Democrat to the United States Senate to fill the vacancy in the term commencing March 4, 1871. Ransom was re-elected in 1876, 1883, and 1889 and served from January 30, 1872, to March 4, 1895. Ransom served briefly as President Pro tempore of the Senate during the 53rd Congress. He was later appointed United States Minister to Mexico and served from 1895 to 1897.[2]
Following his term as ambassador, Ransom retired to Verona, his estate, and engaged in agricultural pursuits.[3]
Personal life
On January 19, 1853, Ransom married Martha Anne "Pattie" Exum of Northampton County, North Carolina. The couple resided at Verona, the Exum family's plantation on the banks of the Roanoke River. Matt and Martha produced at least eight children together: Matt W., Jr., Joseph E., George E., Esther, Patrick Exum, and Robert. A slaveholder, Matt W. Ransom also sired two children with Emma Outland, one of the women of African descent Ransom enslaved; Matt W. Ransom's children with the enslaved Emma Outland were Douglas Ransom (born 1859) and Alice Ransom (wife of Edward "Ned" Rawles, one of North Carolina's first African-American state legislators).[4][5]