| Election Name: | 1998 United States Senate election in Arizona |
| Country: | Arizona |
| Type: | presidential |
| Ongoing: | no |
| Previous Election: | 1992 United States Senate election in Arizona |
| Previous Year: | 1992 |
| Next Election: | 2004 United States Senate election in Arizona |
| Next Year: | 2004 |
| Election Date: | November 3, 1998 |
| Image1: | McCain2 (1).jpg |
| Nominee1: | John McCain |
| Party1: | Republican Party (United States) |
| Popular Vote1: | 696,577 |
| Percentage1: | 68.74% |
| Nominee2: | Ed Ranger |
| Party2: | Democratic Party (United States) |
| Popular Vote2: | 275,224 |
| Percentage2: | 27.16% |
| Map Size: | 220px |
| U.S. Senator | |
| Before Election: | John McCain |
| Before Party: | Republican Party (United States) |
| After Election: | John McCain |
| After Party: | Republican Party (United States) |
The 1998 United States Senate election in Arizona was held November 3. Incumbent Republican U.S. Senator John McCain won re-election to a third term.