| Election Name: | Baltimore mayoral election, 1899 |
| Type: | Presidential |
| Ongoing: | no |
| Previous Election: | 1897 Baltimore mayoral election |
| Previous Year: | 1897 |
| Next Election: | 1903 Baltimore mayoral election |
| Next Year: | 1903 |
| Election Date: | May 2, 1899 |
| Image1: | Thomas Gordon Hayes.png |
| Candidate1: | Thomas Gordon Hayes |
| Party1: | Democratic Party (United States) |
| Candidate2: | William T. Malster |
| Party2: | Republican Party (United States) |
| Mayor | |
| Before Election: | William T. Malster |
| Before Party: | Republican Party (United States) |
| After Election: | Thomas Gordon Hayes |
| After Party: | Democratic Party (United States) |
The 1899 Baltimore mayoral election saw Thomas Gordon Hayes defeat incumbent mayor William T. Malster by a 8,748 vote margin-of-victory.[1] This was the first election under a new charter that extended mayoral terms from two years to four years and moved mayoral elections to May.[1]
By campaigning on a "good government" platform, Democrats managed to defeat Malster, who in his previous election had defeated Democrat Henry Williams by a 6,000 vote margin-of-victory.[1]