| Election Name: | 1901 Monmouth Boroughs |
| Type: | presidential |
| Country: | United Kingdom |
| Previous Election: | Monmouth Boroughs (UK Parliament constituency)#Elections in the 1900s |
| Previous Year: | 1900 |
| Next Election: | Monmouth Boroughs (UK Parliament constituency)#Elections in the 1900s |
| Next Year: | 1906 |
| Election Date: | 7 May 1901 |
| Party1: | Conservative Party (UK) |
| Popular Vote1: | 4,604 |
| Percentage1: | 51.9% |
| Party2: | Liberal Party (UK) |
| Popular Vote2: | 4,261 |
| Percentage2: | 48.1% |
| Map Size: | 250px |
| Posttitle: | Subsequent MP |
| Before Party: | Conservative Party (UK) |
| After Party: | Liberal Party (UK) |
The 1901 Monmouth Boroughs by-election was a by-election held on 7 May 1901 for the British House of Commons constituency of Monmouth Boroughs.
The by-election was triggered by the unseating of the Conservative Party Member of Parliament (MP) Frederick Rutherfoord Harris, as a result of an election petition alleging irregularities in election spending.The Liberal candidate was Albert Spicer, who had previously been the sitting MP but had lost in the previous general election. The result was a victory for the Conservative candidate Sheriff Joseph Lawrence, who held the seat, although the party's majority was halved.
Despite the intervention of a Labour Representation Committee candidate, the Liberal Party gained the seat;