| Election Name: | 1845 Portuguese legislative election |
| Country: | Portugal |
| Flag Year: | 1830 |
| Type: | Parliamentary |
| Ongoing: | no |
| Previous Election: | 1842 Portuguese legislative election |
| Previous Year: | 1842 |
| Next Election: | 1847 Portuguese legislative election |
| Next Year: | 1847 |
| Election Date: | 3 & 17 August 1845 |
| Seats For Election: | 142 seats to the Chamber of Deputies |
| Majority Seats: | 72 |
| Prime Minister | |
| Before Election: | 1st Duke of Terceira |
| Before Party: | Chartist |
| After Election: | 1st Duke of Terceira |
| After Party: | Chartist |
Parliamentary elections were held in Portugal on 3 and 17 August 1845.[1]
The elections were held under the Constitutional Charter of 1826,[2] and in accordance with a decree issued on 28 April 1845.[1] Members of the Chamber of Deputies were elected in an indirect system in which voters elected provincial assemblies, who in turn elected members of the Chamber.[2]
The 142 members of the Chamber of Deputies included 119 representing the mainland and 10 representing islands (all elected in multi-member constituencies), with another 13 representing overseas colonies (three elected in single-member constituencies and ten in multi-member constituencies).[1]
The result was a victory for the Cabralistas, with Miguelistas advising voters to boycott the elections.[1] The opposition won only six seats in Alentejo.[1]