[1] As of the 2021 assembly elections, the current MLA is Pramod Narayanan of Kerala Congress (M).

Ranni Niyamasabha constituency is composed of the following local self governed segments:[2] The following list contains all members of Kerala legislative assembly who have represented Ranni Niyamasabha Constituency during the period of various assemblies:[4] Key CPI(M)   INC   CPI   Independent   KEC   INC(U)   IC(S) Percentage change (±%) denotes the change in the number of votes from the immediate previous election.

There were 1,93,684 registered voters in Ranni Constituency for the 2021 Kerala Niyama Sabha Election.

[5] There were 1,90,196 registered voters in Ranni Constituency for the 2016 Kerala Niyamasabha Election.

[6] There were 1,75,669 registered voters in the constituency for the 2011 election.