Local community resource for visitors and residents. Specialties include relocation information, community calendar featuring fun things to do in Collin County, local resources, and suggested itineraries. Collin County is one of the fastest growing communities in the United States, with people relocating from all over the world as businesses relocate to Collin County. Collin County Guide provides the information your employees will need to settle into life in Collin County, including Allen, Frisco, McKinney and Plano.