Most Homeowners' Associations (HOAs) are organized as non-profit corporations and are regulated by relevant state government agencies and laws. To find an association's corporate status, contact information, list of board members, current community manager (if applicable), and Articles of Incorporation, one should visit the state agency responsible for overseeing corporations in their state. This can be done by entering the name of their community under the "business search" field.
Links to the relevant government agency in each state can be found below.