| Election Name: | 1905 Portuguese legislative election |
| Country: | Portugal |
| Flag Year: | 1830 |
| Type: | Parliamentary |
| Previous Election: | 1904 Portuguese legislative election |
| Previous Year: | 1904 |
| Next Election: | April 1906 Portuguese legislative election |
| Next Year: | Apr. 1906 |
| Majority Seats: | 75 |
| Election Date: | 12 December 1905 |
| Colour2: | 0070C0 |
| Leader Since2: | 1900 |
| Last Election2: | 100 seats |
| Seats2: | 32 |
| Seats After2: | 68 |
| Colour1: | FF0000 |
| Leader Since1: | 1885 |
| Last Election1: | 43 seats |
| Seats1: | 109 |
| Seats After1: | 66 |
| Colour3: | 00008b |
| Leader Since3: | 1901 |
| Last Election3: | 1 seat |
| Seats3: | 3 |
| Seats After3: | 2 |
| Posttitle: | Prime Minister after election |
| After Party: | Progressive |
Parliamentary elections were held in Portugal on 12 December 1905.[1] The result was a victory for the Progressive Party, which won 109 seats.[2]
| Party | Votes | % | Seats | +/– |
|---|---|---|---|---|
| Progressive Party | 109 | +66 | ||
| Regeneration Party | 32 | –68 | ||
| Liberal Regenerator Party | 3 | +2 | ||
| Other parties and independents | 4 | 0 | ||
| Invalid/blank votes | – | – | – | |
| Total | 148 | 0 | ||
| Registered voters/turnout | 679,926 | – | – | |
| align=left colspan=5 | Source: Nohlen & Stöver | |||
The results exclude seats from overseas territories.[2]