Medina Sidonia is home to around 11,000 residents, with the majority being of Andalusian descent. The town has a relatively small population compared to other cities in the province, which contributes to its peaceful and laid-back atmosphere. Despite its size, Medina Sidonia has a diverse demographic, with a growing number of expatriates and seasonal visitors who are attracted to its historical charm and Mediterranean lifestyle.
The town has experienced steady population growth in recent years, partly due to its increasing appeal as a tourist destination and a hub for small-scale agricultural and artisanal businesses.