List of number-one singles of 1999 (Ireland)
This list of number-one hits in Ireland in 1999. It was the year of 19 number-one singles.
- Spice Girls - Goodbye 1 weeks (26 December 1998 - 1 January 1999)
- 4 weeks ( January 2 to January 29 )
- 3 weeks ( January 30-February 19 )
- 6 weeks ( February 20-April 2 )
- 5 weeks ( April 3 to May 7 )
- 2 weeks ( May 8 to May 21 )
- 2 weeks ( May 22-June 4 )
- 2 weeks ( June 5-June 18 )
- 4 weeks ( June 26 to July 23 )
- 2 weeks ( July 31 to August 13 )
- 2 weeks ( August 14 to August 27 )
- 3 weeks ( August 28 to September 17 )
- 5 weeks ( September 18 to October 22 )
- 4 weeks ( 23 October to 19 November )
- 2 weeks ( November 20 to November 3 )
- 5 weeks (December 18, 1999 - January 21, 2000 )