To increase the representative character of the States, Deputies, elected for three years, were added in 1856, one from each country parish and three from St Helier. In 1907 the Town was divided into three Districts, each returning two Deputies. Following the reform of the States in 1948, at which point the Jurats and parish Rectors were removed from the States, the number of Deputies was raised to 28. In 1974 there were further changes to the districts and the total number of Deputies increased to 29.
The representation in the States in 2010 was:
- St Helier: ten deputies - three in No 1 district, three in no 2, four in no 3.
- St Saviour: five deputies - two each in No 1 and 2 districts, one in no 3.
- St Brelade: three deputies - one in No 1 district, two in No 2 district
- St Clement, St Lawrence: two deputies each
- Grouville, St Martin, St John, St Mary, St Ouen, St Peter, Trinity: one deputy each.
In 2022 the composition of the States was reorganised, the role of Senator was abolished, and the island was divided into a number of 'super' constituencies:
- Grouville and St Martin: three deputies
- St Brelade: four deputies
- St Clement: four deputies
- St Helier Central: five deputies
- St Helier North: four deputies
- St Helier South: four deputies
- St John, St Lawrence and Trinity: four deputies
- St Mary, St Ouen and St Peter: four deputies
- St Saviour: five deputies
In addition, the Constable of each of the 12 parishes sits in the States, giving a total membership of 49