| Election Name: | August 1906 Portuguese legislative election |
| Country: | Portugal |
| Flag Year: | 1830 |
| Type: | Parliamentary |
| Previous Election: | April 1906 Portuguese legislative election |
| Previous Year: | Apr. 1906 |
| Next Election: | 1908 Portuguese legislative election |
| Next Year: | 1908 |
| Majority Seats: | 75 |
| Election Date: | 19 August 1906 |
| Colour4: | 0070C0 |
| Leader Since4: | 1900 |
| Last Election4: | 104 seats |
| Seats4: | 24 |
| Seats After4: | 80 |
| Colour2: | FF0000 |
| Leader Since2: | 1885 |
| Last Election2: | 19 seats |
| Seats2: | 45 |
| Seats After2: | 26 |
| Colour5: | 8B0000 |
| Leader Since5: | 1905 |
| Last Election5: | 9 seats |
| Seats5: | 4 |
| Seats After5: | 5 |
| Colour1: | 00008b |
| Leader Since1: | 1901 |
| Last Election1: | 7 seats |
| Seats1: | 65 |
| Seats After1: | 58 |
| Posttitle: | Prime Minister after election |
| After Party: | Liberal Regenerator |
Parliamentary elections were held in Portugal on 19 August 1906, the second that year and the fourth in three years.[1] For the first time in several decades no party won an overall majority, with the Liberal Regenerator Party emerging as the largest party with 65 seats.[2]
| Party | Votes | % | Seats | +/– |
|---|---|---|---|---|
| Liberal Regenerator Party | 65 | +58 | ||
| Regeneration Party | 24 | –80 | ||
| Progressive Party | 45 | +26 | ||
| Progressive Dissidence | 4 | –5 | ||
| Portuguese Republican Party | 4 | +3 | ||
| Other parties and independents | 6 | –2 | ||
| Invalid/blank votes | – | – | – | |
| Total | 489,778 | 100 | 148 | 0 |
| Registered voters/turnout | 677,693 | 72.3 | – | – |
| align=left colspan=5 | Source: Nohlen & Stöver | |||
The results exclude seats from overseas territories.[2]