Where is plague most common?

Outside the U.S.: In the U.S., there are about 10-15 cases of plague reported each year. The cases are usually from Colorado, Utah, New Mexico, and Arizona. Throughout the world, there are 1000-3000 cases of plague reported each year, mainly from Africa, southern Asia, and South America (plus there are an unknown number of unreported cases).

Outside of US: Africa, asia, south america. It is rare in europe and the us/canada.