|Date||27–29 March 1991 (3 days)|
|Outcome||The election of the 5th Central Committee|
The 5th National Congress of the Lao People's Revolutionary Party (LPRP) was held in Vientiane on 27–29 March 1991. The congress occurs once every five years. A total of 367 delegates represented the party's nearly 60,000 card-carrying members.