Orrtanna is a census-designated place in Adams County, Pennsylvania, United States. The population was 183 at the 2020 census. Orrtanna was established in 1885 around Orr Station, a stop on the Baltimore and Harrisburg Railway. It originally was known as Wortzville after George Wortz, a local businessman, but was changed to Orr Station and the…Orrtanna is a census-designated place in Adams County, Pennsylvania, United States. The population was 183 at the 2020 census. Orrtanna was established in 1885 around Orr Station, a stop on the Baltimore and Harrisburg Railway. It originally was known as Wortzville after George Wortz, a local businessman, but was changed to Orr Station and then Orr Glen. The establishment of the post office in 1892 lead to the realization that Orr Glen was already a registered town name in Pennsylvania, so the name finally became Orrtanna in 1892, for Isaiah Orr, a large property owner in the area, and a nearby tannery.
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