| Election Name: | 1878 Portuguese legislative election |
| Country: | Portugal |
| Flag Year: | 1830 |
| Type: | Parliamentary |
| Previous Election: | 1874 Portuguese legislative election |
| Previous Year: | 1874 |
| Next Election: | 1879 Portuguese legislative election |
| Next Year: | 1879 |
| Majority Seats: | 69 |
| Election Date: | 13 October 1878 |
| Colour1: | 0070C0 |
| Leader Since1: | 1856 |
| Last Election1: | 78 seats |
| Seats1: | 97 |
| Seats After1: | 19 |
| Colour2: | FF0000 |
| Leader Since2: | 1876 |
| Last Election2: | New |
| Seats2: | 22 |
| Seats After2: | New |
| Colour5: | 228B22 |
| Leader5: | Political Directory |
| Leader Since5: | 1876 |
| Image5: | PRP |
| Last Election5: | New |
| Seats5: | 1 |
| Seats After5: | New |
| Colour4: | 808080 |
| Leader Since4: | 1871 |
| Last Election4: | 6 seats |
| Seats4: | 14 |
| Seats After4: | 8 |
| Posttitle: | Prime Minister after election |
Parliamentary elections were held in Portugal on 13 October 1878.[1] The result was a victory for the Regeneration Party, which won 97 seats.[2]
| Party | Votes | % | Seats |
|---|---|---|---|
| Regeneration Party | 97 | ||
| Progressive Party | 22 | ||
| Constituent Party | 14 | ||
| Portuguese Republican Party | 1 | ||
| Other parties and independents | 3 | ||
| Invalid/blank votes | – | – | |
| Total | 523,929 | 100 | 137 |
| Registered voters/turnout | 824,726 | 63.5 | – |
| align=left colspan=4 | Source: Nohlen & Stöver | ||
The results exclude the seats from overseas territories.[2]