Table of voting systems by nation

Key

 * Seats per district - most elections are split into a number of districts (for example, a constituency). In some elections, there is one person elected per district. In others, there are many people elected per district.
 * Total number of seats - the number of representatives elected to the body in total.
 * Election threshold - see Election threshold
 * FPTP - First-past-the-post electoral system
 * Party list - One of many Party-list proportional representation systems. Where possible, this has been replaced by the allocation system used within the party-list (e.g. d'Hondt method)
 * Parallel voting - This means that two simultaneous systems are used to elect representatives to the same body. If there is interchange between the two systems, this is called (e.g. the number elected in one system affects the number elected in the other), then this is the additional member system.

Much of the data regarding which voting system is used is drawn from this 2002 report from the Institute for Democracy and Electoral Assistance.

Much of the data regarding the size of the parliaments comes from this 1997 report from the same Institute.

Some of the data has been updated since then.