 The county's first railroad was constructed between 1850–1854, a line that ran from Springfield to Delaware and crossed through the county in Milford, Marysville, Irwin, and Dover.A railroad called the New York, Pennsylvania, and Ohio line was chartered in 1851 and would eventually run through Union County with station points at Richwood, Woodland, Claibourne, Pottersburg, Broadway, and Peoria.The Columbus and Bellefontaine railroad was incorporated in 1878 and had station points in the county at Marysville.