Martinsville is a city in Washington Township, Morgan County, in the U.S. state of Indiana. The population was 12,309 at the 2020 United States Census. The city is the county seat of Morgan County. History Martinsville was founded in 1822. It is said to be named for John Martin, a county commissioner. A post office has been in operation at Martinsville since 1823. The Morgan County Courthouse, completed in 1859, features a red brick and Italianate design, and is one of the few pre-Civil War courthouses in Indiana. Architect Isaac Hodgson designed the courthouse, and it was built by Perry Magnus Blankenship. Hodgson designed six Indiana courthouses including Jennings County Courthouse (1859), Morgan County (1857), Henry County Courthouse, Bartholomew County Courthouse (1871), and his largest in Marion County, in Indianapolis. In 1899, Eugene Shireman, a Martinsville entrepreneur, turned his swamp land into fisheries and started Grassyfork Fisheries. Once dubbed the "Goldfish Capital of the World", today Martinsville has several large fisheries that sell fish to many parts of the world. Shireman's actions changed the landscape of the Martinsville area, and his fisheries can be seen today throughout Shireman subdivision. Martinsville is also home to other fisheries. From 1888 until 1968, visitors sought out the Martinsville's sanitaria for health benefits from their artesian mineral water. Over nearly 100 years, almost a dozen sanitaria were in operation for various periods of time, including the first black spa in Martinsville. Albert Merritt (1871–1958), founder of the Boys' Club in Martinsville, born near Bowling Green, was the son of freedmen. He came to Martinsville Mineral Springs Sanitarium in the 1890s from a job as a porter at the Sennings Hotel in Louisville, and lived at the sanitarium for the rest of his life, never marrying. He worked with the children of Martinsville for fifty years, building a clubhouse on North Marion Street. Merritt Park on the northwest end of town is named for Albert. Visitors would travel by rail and road to bathe and refresh in the mineral springs and waters. Many luminaries visited Martinsville in the early 20th century to enjoy the mineral waters and spas for their perceived therapeutic and restorative qualities. In 1892, the Old Hickory Furniture Company was formed. The Morgan County Public Library's Digital Archive has a collection of photographs of Old Hickory furniture including some displays for Marshall Field & Co. In recent years, Martinsville has an array