The Flag of Laos was adopted on December 2, 1975. The flag had previously been used by the short-lived Lao nationalist government of 1945.

The flag consists of three horizontal strips, middle blue strip is twice the height of the top and bottom red stripes. In the middle is a white disc, the diameter of the disc is 0.8 times the height of the blue stripe. The flag ratio is 2:3.