| Election Name: | 1851 Portuguese legislative election |
| Country: | Portugal |
| Flag Year: | 1830 |
| Type: | Parliamentary |
| Previous Election: | 1847 Portuguese legislative election |
| Previous Year: | 1847 |
| Next Election: | 1852 Portuguese legislative election |
| Next Year: | 1852 |
| Majority Seats: | 80 |
| Election Date: | 2 & 16 November 1851 |
| Colour1: | 0070C0 |
| Leader1: | Rodrigo da Fonseca Magalhães |
| Leader Since1: | 1851 |
| Seats1: | 125 |
| Colour2: | 376091 |
| Party2: | Cartistas |
| Seats2: | 34 |
| Prime Minister | |
| Posttitle: | Prime Minister after election |
| Before Election: | 1st Duke of Saldanha |
| Before Party: | Regenerator |
| After Election: | 1st Duke of Saldanha |
| After Party: | Regenerator |
Legislative elections were held in Portugal on was held on 2 and 16 November, 1851.
| Party | Votes | % | Seats | |
|---|---|---|---|---|
| Regenerator Party | 125 | |||
| Cartistas | 34 | |||
| align=left colspan=2 | Total | 100 | 159 | |
| align=left colspan=5 | Source:[1] [2] | |||