YK (or yk) may refer to:
The YKK Group (YKK, Waikeikei Gurūpu) is a Japanese group of manufacturing companies. As the world's largest zipper manufacturer, YKK Group is most famous for making zippers; however, it also manufactures other fastening products, architectural products, plastic hardware and industrial machinery.
Ykiki Beat are a five-piece indie pop band from Tokyo, Japan.
Synaptobrevin homolog YKT6 is a protein that in humans is encoded by the YKT6 gene.
Yksel Osmanovski (Macedonian: Иксел Османовски) (born 24 February 1977) is a Swedish former footballer of Turkish origin who played as a striker.
The young Korean American Network (yKAN) is a 501(c)(3) non-profit, non-partisan organization of 1.5 and 2nd generation Korean-Americans in the New York City area.
YK-11 is a synthetic, steroidal selective androgen receptor modulator (SARM). It is a gene-selective partial agonist of the androgen receptor (AR) and does not induce the physical interaction between the NTD/AF1 and LBD/AF2 (known as the N/C interaction), which is required for full transactivation of the AR.
YK Pao School (上海民办包玉刚实验学校, Hanyu Pinyin: Shànghǎi Mínbàn Bāo Yùgāng Shíyàn Xuéxiào) is a bilingual (Chinese/English) school located in Shanghai, China.
The YkkC/YxkD leader is a conserved RNA structure found upstream of the ykkC and yxkD genes in Bacillus subtilis and related genes in other bacteria.