In years to come Hubbard held various local offices and was a member and chairman of various town and county boards for a number of years. On June 11, 1861 he married Electa Jane Robinson. He was first elected to the Assembly for the 3rd Sheboygan County district in 1861, as a "Union Independent", succeeding Republican William F. Mitchell; and was assigned to the standing committee on enrolled bills. He enlisted as a private in the 27th Wisconsin Volunteer Infantry Regiment on August 11, 1862, and was commissioned as a captain on September 1; his Assembly seat was taken by DemocratHenry Hayes. Hubbard participated in the sieges of Vicksburg and Little Rock before being assigned to recruiting service in December 1863; he was discharged in April, 1864. In 1868 he moved to Lyndon, and took up dealing in livestock as well as farming.
Return to civilian life
He was elected to the Assembly in 1873 from the 2nd Sheboygan County district as a candidate of the Reform Party with 766 votes to 571 for regular Republican S. D. Putnam. He was assigned to the committees on incorporations and legislative expenditures, chairing the latter. He was not a candidate for re-election, and was succeeded by fellow Reform Party candidate Patrick Geraghty. Hubbard served as a deputy warden at the state prison in 1874. In 1876, serving as chairman of his county board of supervisors, Hubbard was elected once again to the Assembly in 1876 as a Liberal Republican, with 1,254 votes to 1,104 for Republican incumbent Nathaniel Farnsworth; he was assigned to the committee on federal relations. By this time, he listed himself simply as a "farmer" with no mention of dealing in livestock. He moved to Mondovi in Buffalo County in 1878, and was elected a fourth time to the Assembly in 1884 for Buffalo County as a Republican, with 1,604 votes to 1,177 for Democratic former Assemblyman George Cowie. He was not a candidate for re-election in 1886, and was succeeded by Republican Joseph Vernon Jones. As of October 1, 1907, he was still listed as an active member of Delta Kappa Epsilon. He was an active member of the Knights of Pythiasfraternal order, eventually serving as Grand Chancellor of that organization's Wisconsin body in 1888-1889. He died June 14, 1910; his grave is in Oak Park Cemetery in Mondovi.