Fireworks Capital of the World Facts about Lawrence County Lawrence County was formed in 1848, from portions of Mercer and Beaver County and was named in honor of a naval hero, Admiral James Lawrence.
New Castle is the county seat.
Many industries grew up around the rivers and streams of the county. The beginning of our steel industry can be traced to the iron furnaces that dot the county - the Wil Roy in Rose Point and the Lawrence at McConnell's Mill State Park. Based on 1997 Census of Agriculture County Data, Lawrence County has 87,177 acres committed to farm land. There are 621 farms in the county with the average size of the farm 140 acres. Dairy is Lawrence County's primary ag industry, followed by cash grain crops and livestock production.