| Election Name: | March 1870 Portuguese legislative election |
| Country: | Portugal |
| Flag Year: | 1830 |
| Type: | Parliamentary |
| Previous Election: | 1869 Portuguese legislative election |
| Previous Year: | 1869 |
| Next Election: | September 1870 Portuguese legislative election |
| Next Year: | Sep 1870 |
| Majority Seats: | 54 |
| Election Date: | 13 March 1870 |
| Colour3: | 0070C0 |
| Leader Since3: | 1856 |
| Last Election3: | 5 seats |
| Seats3: | 14 |
| Seats After3: | 9 |
| Colour1: | 800000 |
| Leader Since1: | 1852 |
| Last Election1: | 15 seats |
| Seats1: | 75 |
| Seats After1: | 60 |
| Colour2: | 953735 |
| Leader Since2: | 1869 |
| Last Election2: | 79 seats |
| Seats2: | 15 |
| Seats After2: | 64 |
| Posttitle: | Prime Minister after election |
| After Party: | Historic |
Parliamentary elections were held in Portugal on 13 March 1870.
| Party | Votes | % | Seats |
|---|---|---|---|
| Historic Party | 75 | ||
| Reformist Party | 15 | ||
| Regenerator Party | 14 | ||
| Independents | 3 | ||
| Total | 227,298 | 107 | |
| Registered voters/turnout | 366,886 | 61.9 | – |
| align=left colspan=4 | Source: ISCSP, Nohlen & Stöver[1] | ||