| Country: | San Marino |
| Flag Year: | 1862 |
| Type: | parliamentary |
| Previous Election: | 1993 |
| Next Election: | 2001 |
| Election Date: | 31 May 1998 |
| Seats For Election: | All 60 seats in the Grand and General Council |
| Majority Seats: | 31 |
| Turnout: | 75.28% (4.75pp) |
| Party1: | Sammarinese Christian Democratic Party |
| Last Election1: | 26 |
| Seats1: | 25 |
| Percentage1: | 40.85 |
| Party2: | Sammarinese Socialist Party |
| Last Election2: | 14 |
| Seats2: | 14 |
| Percentage2: | 23.23 |
| Leader3: | Maurizio Tomassoni |
| Party3: | PPDS–IM–CD |
| Last Election3: | 11 |
| Seats3: | 11 |
| Percentage3: | 18.64 |
| Leader4: | Luciano Sansovini |
| Party4: | APDSplR |
| Last Election4: | 4 |
| Seats4: | 6 |
| Percentage4: | 9.81 |
| Party5: | Socialists for Reform |
| Last Election5: | new |
| Seats5: | 2 |
| Percentage5: | 4.19 |
| Leader6: | Ivan Foschi |
| Party6: | Sammarinese Communist Refoundation |
| Last Election6: | 2 |
| Seats6: | 2 |
| Percentage6: | 3.27 |
General elections were held in San Marino on 31 May 1998.[1] The Sammarinese Christian Democratic Party remained the largest party, winning 25 of the 60 seats in the Grand and General Council,[2] and continued their coalition with the Sammarinese Socialist Party.
Voters had to be citizens of San Marino and at least 18 years old.