The Book of Psalms was written by multiple authors over a long period of time. David is the author of 73 psalms, making him the primary contributor. Other named psalmists include Asaph (12 psalms), the sons of Korah (11 psalms), Solomon (2 psalms), Moses (1 psalm), Heman (1 psalm), and Ethan (1 psalm). There are also 47 anonymous psalms, many of which are likely attributed to David. The composition of the psalms spans roughly a millennium, from as early as the time of Moses to the post-exilic period.

In summary, the psalms were attributed to seven main individual authors and a few families or groups, with King David being the most prominent writer.