Under the Constitution of 1802, the legislative representative apportionment was established by the same law as the senatorial apportionment, but the members of the lower house were chosen annually, while under the later constitutions, their official term is fixed at two years, and the apportionment is designated by dividing the whole population of the state by ——, and the quotient thereof is the ratio of representation in the House. The law provides for this apportionment every ten years. After the admission of Ohio, and prior to the formation of Madison county, this district was represented in the first General Assembly (18%), by the representative of Ross county, and in the second (1803-04). third (1804-05), and fourth (1805-06), by those of Ross and Franklin; in the fifth (1806-07) and sixth (1807-08), by Ross, Franklin and Highland; in the seventh (1808-09) and eighth (1809-10), by Franklin and Delaware.
This brings the date up to the time of the formation of Madison county, which first appears in the formation of a legislative district in the ninth General Assembly (1810-11), Franklin, Madison, Delaware and Pickaway counties composing the same. In the next session (1811-12), only a portion of Pickaway was in this district, while in the eleventh (1812-13), Madison and Delaware were together, and the district so existed until the fifteenth General Assembly (1816-17), when Madison county stood alone. It remained a separate district until the nineteenth legislative session (1820-21), at which time Madison and the newly created county of Union were united. For eight years they voted together, but in the twenty-seventh General Assembly (1828-29), Madison, Union, Logan and Hardin are found forming a district. Hardin county was cut oit from this district ere the twenty-ninth Assembly met (1830-31). No other changes were made until the thirty-fifth session (1836-37), when Madison and Fayette were placed together. This formation remained for four years, and in the thirty-ninth General Assembly (1840-41), Clark county replaced Fayette. The next apportionment came in the forty-third Assembly (1844-45), which placed Madison and Franklin together. Before the meeting of the forty-seventh session (1848-49), this was changed, Madison, Clark and Champaign counties forming a district. This combination existed until the adoption of the new Constitution in 1852, since which time Madison county has been entitled to one representative.