Republic is a village in Seneca County, Ohio, United States. The population was 549 at the 2010 census.HistoryIn 1834, Sidney Smith hired R.M. Shoemaker of Cincinnati to survey a new town at the corners of sections 15, 16, 21, and 22 in Scipio Township. He called it "Republic," though it was known by many early settlers simply as "Scipio Center."With the arrival of a rail line from Sandusky in 1841, Republic became a popular trading center. Stores, warehouses, shops, and factories sprang up almost overnight. And, a second rail line was contemplated between Republic and Melmore in Eden Township.When the old Seneca County courthouse at Tiffin burned on May 21, 1841, efforts were made to establish the new county seat at Republic.Republic's fortunes began to decline when the new Cincinnati, Sandusky & Cleveland Railroad bypassed it to make a straight run to Tiffin, although it experienced something of a revival with the coming of the Baltimore and Ohio Railroad. The railroad passes over State Route 19 via an arch bridge.GeographyRepublic is located at .According to the United States Census Bureau, the village has a total area of 0.86sqmi, all land.Demographics2010 censusAs of the census of 2010, there were 549 people, 220 households, and 151 families residing in the village. The population density was 638.4PD/sqmi. There were 245 housing units at an average density of 284.9/sqmi. The racial makeup of the village was 98.2% White, 0.4% African American, 0.5% Native American, 0.2% Asian, and 0.7% from two or more races. Hispanic or Latino of any race were 1.8% of the population.