Masvingo, home province of Citizens Coalition for Change leader Nelson Chamisa, has the second highest number of people likely to vote at 78%.
The same survey, however, indicated that 58% of the people in Masvingo were not registered. The percentage in the Midlands was lower at 35%.
People aged 36-55, those with primary or no formal education and the poor also constituted the majority of those likely to vote.
Only 52% of the youths said they would vote.