| Irish League Cup | |
| Other Titles: | Coca-Cola League Cup |
| Year: | 1999–2000 |
| Num Teams: | 19 |
| Defending Champions: | Linfield |
| Champions: | Linfield (6th win) |
| Runner-Up: | Coleraine |
| Matches: | 18 |
| Goals: | 59 |
| Prevseason: | 1998–99 |
| Nextseason: | 2000–01 |
The 1999–2000 Irish League Cup (known as the Coca-Cola League Cup for sponsorship reasons) was the 14th edition of the Irish League Cup, Northern Ireland's secondary football knock-out cup competition. It concluded on 18 April 2000 with the final.
Linfield were the defending champions after their fifth League Cup win last season; a 2–1 victory over Glentoran in the previous final. This season they won a record third successive League Cup with a 4–0 victory over Coleraine in the final to lift the cup for the sixth time overall. The 4–0 scoreline remains the joint largest margin of victory in a League Cup final to date, with the record being equalled in 2013.[1] [2]
Linfield's record of winning three consecutive League Cups was equalled by Cliftonville's three consecutive wins in 2012–13, 2013–14 and 2014–15. It was then broken when Cliftonville added a fourth consecutive win in 2015–16.
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