| Election Name: | 1915 Portuguese legislative election |
| Country: | Portugal |
| Ongoing: | no |
| Previous Election: | 1913 Portuguese legislative election |
| Previous Year: | 1913 |
| Next Year: | 1918 |
| Next Election: | 1918 Portuguese general election |
| Election Date: | 13 June 1915 |
| Turnout: | 59.9% (22.8pp) |
| Type: | legislative |
| Vote Type: | Popular |
| Leader1: | Afonso Costa |
| Party1: | Democratic Party (Portugal) |
| Last Election1: | 68 (Chamber) 24 (Senate) |
| Seats1: | 106 (Chamber) 45 (Senate) |
| Leader2: | António José de Almeida |
| Party2: | Evolutionist Party |
| Last Election2: | 41 (Chamber) 16 (Senate) |
| Seats2: | 26 (Chamber) 9 (Senate) |
| Leader3: | Manuel de Brito Camacho |
| Party3: | Republican Union (Portugal) |
| Last Election3: | 36 (Chamber) 18 (Senate) |
| Seats3: | 15 (Chamber) 11 (Senate) |
| Image4: | PSP |
| Party4: | Portuguese Socialist Party |
| Last Election4: | 2 (Chamber) 2 (Senate) |
| Seats4: | 2 (Chamber) 0 (Senate) |
| Leader5: | Central commission |
| Party5: | Catholic Centre Party (Portugal) |
| Last Election5: | New |
| Seats5: | 1 (Chamber) 1 (Senate) |
| Map Size: | 300px |
| Prime Minister | |
| Posttitle: | Prime Minister after election |
| Before Election: | José de Castro |
| Before Party: | Democratic |
| After Election: | Afonso Costa |
| After Party: | Democratic |
| Image5: | CCP |
Parliamentary elections were held in Portugal on 13 June 1915.[1] The result was a victory for the Democratic Party, which won 106 of the 163 seats in the Chamber of Deputies and 45 of the 69 seats in the Senate.[2]
| Party | Chamber of Deputies | Senate | |||||
|---|---|---|---|---|---|---|---|
| Votes | % | Seats | +/– | Seats | +/– | ||
| Democratic Party | 106 | +38 | 45 | +21 | |||
| Evolutionist Party | 26 | –15 | 9 | –7 | |||
| Republican Union | 15 | –21 | 11 | –7 | |||
| Portuguese Socialist Party | 2 | 0 | 0 | –2 | |||
| Catholic Centre Party | 1 | New | 1 | New | |||
| Other parties and independents | 13 | +7 | 3 | –3 | |||
| Invalid/blank votes | – | – | – | – | |||
| Total | 282,387 | 100 | 163 | 69 | |||
| Registered voters/turnout | 471,557 | 59.9 | – | – | |||
| Source: Nohlen & Stöver | |||||||