Positive ions of charges 1, 2, 3, and 4 were obtained for each of several masses in a beam of recoiling fission fragments from a thick U235 target. The existence of such low-charged ions was demonstrated by resolving the beam after passing it through parallel electric and magnetic fields. Energies of these low-charged ions are approximately proportional to their charges. Abundances of the low-charged ions are of the order of 1/2 % of the total number of emitted fission fragments. At higher charges, the charge on a fission fragment emitted from a thick source appears to be roughly proportional to its velocity. Abundances of low-charged ions appear to depend on their chemical properties.