Vale said it was eight people short, the Castel 12 and St Sampson’s is also in need.
The States has been running two-hour training sessions which were full and a spokesperson said it was allocating people once these had been completed.
So far, St Peter Port, St Andrew, St Peter’s and St Martin’s have all successfully secured enough volunteers.
St Saviour’s constable Neil Le Poidevin said over the weekend they were not far off having a complete list.
Vale senior constable Richard Leale said: ‘We could do with another eight volunteers who are probably looking at a two-hour stint.’
As the only parish with three polling stations, St Sampson’s is hosting a meeting today as they are not yet full.
Castel has enough volunteers for the douzaine station, but requires another 12 volunteers to be stationed at KGV.
An election team spokesperson said: ‘We already have around 250 people signed up to our training sessions, of which about half are new to volunteering in the election. The rest have worked in polling stations before.’
Voting can be done from 8am until 8pm at St Sampson’s High School and The Princess Royal Centre for the Performing Arts on Saturday 3 and Sunday 4 October for anyone on the electoral roll.
Following that, voting opens during the same time frame at the parish polling station as well as the centre on Tuesday 6 and Wednesday 7 October.
Parish polling stations will be open only to residents of that parish.
For the Castel this will be at the douzaine room and KGV club house; the Forest at the douzaine room, St Andrew’s at the douzaine room, St Martin’s in the parish hall, St Peter Port at the constables’ office and performing arts centre, St Peter’s at the community hall, St Sampson’s at the douzaine room, the church community hall and the high school, St Saviour’s at the community centre, Torteval in the church hall and the Vale will be at the douzaine room.