| Election Name: | 1911 Portuguese Constituent National Assembly election |
| Country: | Portugal |
| Type: | parliamentary |
| Ongoing: | no |
| Previous Election: | 1910 Portuguese legislative election |
| Previous Year: | 1910 |
| Next Election: | 1913 Portuguese legislative election |
| Next Year: | 1913 |
| Seats For Election: | 234 seats to the Chamber of Deputies |
| Majority Seats: | 118 |
| Election Date: | 28 May 1911 |
| Leader1: | Teófilo Braga |
| Leader Since1: | 1910 |
| Party1: | Republican Party |
| Last Election1: | 14 |
| Seats1: | 229 |
| Seat Change1: | 215 |
| Popular Vote1: | 210,000 |
| Percentage1: | 84% |
| Swing1: | 75% |
| Colour1: | 228B22 |
| Leader2: | Azedo Gneco |
| Leader Since2: | 1895 |
| Party2: | Socialist Party |
| Last Election2: | Did not run |
| Seats2: | 2 |
| Seat Change2: | New |
| Popular Vote2: | 8,000 |
| Percentage2: | 7% |
| Swing2: | New |
| Colour2: | EF1C27 |
| Map Size: | 300px |
| Prime Minister | |
| Posttitle: | Prime Minister after election |
| Before Election: | Teófilo Braga |
| Before Party: | PRP |
| After Election: | Teófilo Braga |
| After Party: | PRP |
Constituent Assembly elections were held in Portugal on 28 May 1911, following a coup in October 1910.[1] The result was a victory for the Portuguese Republican Party, which won 229 of the 234 seats.[2]
The country was divided into 51 constituencies for the election.[3] Lisbon elected 20 members from two 10 member seats using proportional representation and the d'Hondt method, whilst Oporto had one 10 member constituency using the same system.[3] The remaining seats were elected from 48 constituencies with three or four members.[3]
Property qualifications for voters were abolished and suffrage was extended to all adults who were either literate or heads of their households, as well as soldiers, who had previously been barred from voting.[4] Bankrupts and "vagabonds" were excluded from the electoral roll.[3]
Candidates for the election had to be literate, and could not run in more than one seat.[3] Party lists had to obtain a certain number of signatures in every constituency (100 in Lisbon and Oporto and 25 in other constituencies) in order to contest the election.[3]
The table below lists the parties that contested the elections:
| Name | Ideology | Political position | Leader | |||
|---|---|---|---|---|---|---|
| PRP | Portuguese Republican Party | Centre | Teófilo Braga | |||
| PSP | Portuguese Socialist Party | Left-wing | Azedo Gneco | |||
| Party | Votes | % | Seats |
|---|---|---|---|
| Portuguese Republican Party | 229 | ||
| Portuguese Socialist Party | 2 | ||
| Other parties | 3 | ||
| Invalid/blank votes | – | – | |
| Total | 234 | ||
| Registered voters/turnout | 846,801 | – | |
| align=left colspan=4 | Source: Nohlen & Stöver | ||
The 1911 constitution was subsequently drawn up, which provided for a bicameral parliament and a president elected by a two-thirds vote in Parliament.[3]