A referendum on the electoral system was held in Switzerland on 23 October 1910.

[1] Voters were asked whether they approved of introducing proportional representation for National Council elections.

[1] Although the proposal was approved by a majority of cantons, it was rejected by 52.5% of voters.

However, a third referendum on the same issue was held in 1918, and passed with 66.8% in favour.

[2] Full cantons counted as one vote, whilst half cantons counted as half.