FIG. 1 is a front elevational view of a dart holder according to my design;

FIG. 2 is a left elevational view thereof;

FIG. 3 is a top plan view thereof, the bottom plan view thereof having no ornamental features;

FIG. 4 is a front elevational view thereof with a cover spaced from its holder body;

FIG. 5 is an upward plan view looking into the cover;

FIG. 6 is a downward plan view looking into the holder;

FIG. 7 is a rear elevational view of the dart holder; and,

FIG. 8 is a right elevational view thereof.