Category:1998–99 in European rugby union by country

• 1998–99 in British rugby union‎ (3 C)

E

• 1998–99 in English rugby union‎ (2 C, 10 P)

F

• 1998–99 in French rugby union‎ (2 C, 11 P)

I

• 1998–99 in Irish rugby union‎ (2 C, 9 P)
• 1998–99 in Italian rugby union‎ (2 C, 5 P)

R

• 1998–99 in Romanian rugby union‎ (1 C, 2 P)
• 1999 in Russian rugby union‎ (1 P)

S

• 1998–99 in Scottish rugby union‎ (1 C, 8 P)

W

• 1998–99 in Welsh rugby union‎ (2 C, 10 P)