The 1998 Fed Cup was the 36th edition of the most important competition between national teams in women's tennis. In the final, Spain defeated Switzerland at Palexpo Hall in Geneva, Switzerland on 19–20 September, giving Spain its fifth title.
The four losing teams in the World Group first round ties (Belgium, Czech Republic, Germany and Netherlands), and four winners of the World Group II ties (Croatia, Italy, Russia and Slovakia) entered the draw for the World Group play-offs.
Date: 25–26 July
| Venue | Surface | Home team | Score | Visiting team | |
|---|---|---|---|---|---|
| 4–1 | |||||
| Indoor hard | 4–1 | ||||
| 3–2 | |||||
| 1–4 |
The World Group II was the second highest level of Fed Cup competition in 1998. Winners advanced to the World Group play-offs, and losers played in the World Group II play-offs.
Date: 18–19 April
| Venue | Surface | Home team | Score | Visiting team | |
|---|---|---|---|---|---|
| Indoor carpet | 3–2 | ||||
| 2–3 | |||||
| Outdoor clay | 4–1 | ||||
| Outdoor clay | 1–4 |
The four losing teams from World Group II (Argentina, Australia, Austria and Japan) played off against qualifiers from Zonal Group I. Two teams qualified from Europe/Africa Zone (Belarus and Poland), one team from the Asia/Oceania Zone (South Korea), and one team from the Americas Zone (Venezuela).
Date: 12–13 July
| Venue | Surface | Home team | Score | Visiting team | |
|---|---|---|---|---|---|
| 5–0 | |||||
| 5–0 | |||||
| Outdoor clay | 1–4 | ||||
| Indoor hard | 4–1 |
Venue: Tennis Academy, Brasília, Brazil (outdoor clay)
Dates: 14–17 April
Venue: Chipinque Racquet Club, Monterrey, Mexico (outdoor clay)
Dates: 27 April – 3 May
Venue: Thana City Golf Club, Samutpakarn, Thailand (outdoor hard)
Dates: 16–20 February
Venue: Thana City Golf Club, Samutpakarn, Thailand (outdoor hard)
Dates: 16–20 February
Venue: La Manga Club, Murcia, Spain (outdoor clay)
Dates: 14–18 April
Venue: Ali Bey Club, Manavgat, Turkey (outdoor clay)
Dates: 5–9 May