Spring Grove is a borough in York County, Pennsylvania, United States. The population was 2,167 at the 2010 census. The town is known for the strong smell associated with a paper mill owned by the Glatfelter Company.

The site of Spring Grove was laid out in 1747 on the banks of Codorus Creek, midway between York and Hanover, by a surveyor for the Penns. Its growth since that time falls into two periods, each lasting approximately 100 years. The first witnessed development of the borough as an iron-making center. The second, which extends to the present day, is as a papermaking center. The businesses of both periods have relied on certain natural resources of the area.

Originally, Spring Grove was a part of Paradise Township and was contained within the boundaries of Lancaster County. York County was formed in 1749 and Jackson Township, including Spring Grove, in 1853. The residents of the community petitioned the County Court in 1882 for incorporation as a borough, and in August of that year their petition was granted. Since that time, the borough has grown in area as a result of annexation of the surrounding land, the largest annexation having taken place in 1953.

In the 1770s, attracted by the presence of water, iron ore and wood for charcoal in the Pigeon Hills, an iron manufacturer established a forge at "Spring Forge". It is known as Spring Grove. The early German and English woodchoppers who flocked to this first Pennsylvania iron industry west of the Susquehanna River were the forebears of today's community. By the mid-19th century, the manufacturing of iron had grown to a point where almost 200 short tons (180,000 kg) of iron bar were produced locally each year.

...
Wikipedia