The National Association of Counties (NACo) is an organization that represents county governments across the United States. Founded in 1935, it aims to advocate for county interests at the federal level, providing resources, research, and training to help counties improve their services and governance. NACo also facilitates collaboration among counties by sharing best practices and innovative solutions. It addresses various issues, including public health, infrastructure, and economic development, ensuring that county officials have the tools and support they need to effectively serve their communities.