Abstract: A floating dock system which comprises a plurality of locatable floats and interlockable deck sections overlying and supported by the floats. For interlock, the deck sections are arranged with interlapping ends for over or underlying next longitudinally adjacent sections with attachment receiving passages along such edges for positive connection therebetween. The deck sections are connectable to the floats to provide a dock of various, desired configurations. The float sections and the deck sections are hollow with the deck sections selectively fillable with expanded foam material. Selectively spaced and located connective passages are provided in the float and deck sections for combining the same into desired configurations and to meet various flotation requirements. Spanning and supporting members to extend between floats are available for particular installations.