Piedras Blancas has a population of approximately 10,000 residents, contributing to its close-knit, friendly atmosphere. The town is predominantly Spanish-speaking, though English is widely understood, particularly in areas frequented by tourists. The population is a mix of locals and newcomers, with a growing number of residents who work in nearby Avilés or Gijón but prefer the quieter, coastal lifestyle of Piedras Blancas.
The demographic is relatively diverse, with a mix of families, retirees, and young professionals who enjoy the slower pace of life while remaining close to larger urban centers. The town has seen steady growth in recent years as more people discover its appeal, particularly as a peaceful yet accessible coastal community.