Parliamentary elections will be held in Estonia on 3 March 2019.
The 101 members of the Riigikogu are elected by proportional representation in twelve multi-member constituencies. Seats are allocated using a modified D’Hondt method. Parties have to pass a nationwide threshold of 5%, but if the number of votes cast for an individual candidate exceeds or equals the simple quota (obtained by dividing the number of valid votes cast in the electoral district by the number of mandates in the district), they are elected.
Sources and further reading:
How Estonia Secures Its Electronic Elections From Kremlin Attacks