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 )