1910 Swiss electoral system referendum|
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| Choice | Votes | % |  
| Yes | 240,305 | 47.54% |  
| No | 265,194 | 52.46% |  
| Valid votes | 505,499 | 98.44% |  
| Invalid or blank votes | 8,035 | 1.56% |  
| Total votes | 513,534 | 100.00% |  
| Registered voters/turnout | 823,679 | 62.35% |  | 
A referendum on the electoral system was held in Switzerland on 23 October 1910. Voters were asked whether they approved of introducing proportional representation for National Council elections. Although the proposal was approved by a majority of cantons, it was rejected by 52.5% of voters. This was the second such referendum, after the one in 1900 also failed. However, a third referendum on the same issue was held in 1918, and passed with 66.8% in favour.