A dimensionless correlation for the axial dispersion of particles and liquid tracer in draining foam has been developed that expresses the dimensionless dispersion as a function of Peclet and Stokes numbers. The correlation is fitted to the data of Lee et al., Coll. and Surf. A. 263, 320-329 (2005). The value of the axial dispersion coefficient is independent of the self-dispersivity. It is seen that Saffman, J. Fluid. Mech. 6, 321-349 (1959) model for the dispersion coefficient in solid porous media only provides order of magnitude prediction of the axial dispersion coefficient but it can inform about the dominant mechanisms of dispersion.