Total population on the left bank of the Dniester river (minus Tighina): 546,400
Total population in raions mostly on the left bank of the Dniester river (minus Tighina): 601,660
(note that percentages below are given from the second figure)
1989 Census in Transnistria Wikipedia
The 1989 Census in Transnistria was organized by the authorities of the MSSR in the final days of its existence as a Soviet republic. It took place as part of the Soviet Census of 1989.
Results from the 1989 census showed that among the population of Transnistria, approximately 40% were ethnic Moldovans, 28% Ukrainians and 25% Russians.