18915 is a Postal Code in United States of America.
- 18915 a.k.a. Argemone mexicana is a species of poppy found in Mexico and now widely naturalized in many parts of the world. An extremely hardy pioneer plant, it is tolerant of drought and poor soil, often being the only cover on new road cuttings or verges. It has bright yellow latex, and though poisonous to grazing animals, is rarely eaten, but has been used medicinally by many people including those in its native area, the Natives of the western US and parts of Mexico.
- also known as 蓟罂粟
- 18915 a.k.a. Knockout is an NBC game show that aired from October 3, 1977 to April 21, 1978. A Ralph Edwards production, it was hosted by Arte Johnson, with announcing duties handled first by Jay Stewart and later by John Harlan. A British version of the show, called Odd One Out, aired from 1982–1985.