TDK Corporation (TDK株式会社, TDK Kabushiki-gaisha^?), formerly TDK Electronics Co., Ltd (東京電気化学工業株式会社^?, TYO: 6762), is a Japanese consumer electronics company that manufactures electronic materials, electronic components, and recording and data-storage media, and markets them globally. Their motto is "Contribute to culture and industry through creativity". The initials TDK come from the original Japanese name of the company: Tokyo Denki Kagaku (Tokyo Electric and Chemicals).

TDK was founded in Japan on 7 December 1935 to manufacture iron-based magnetic material ferrite, which had been recently invented by Yogoro Kato and Takeshi Takei. In 1952 they began production of magnetic tapes, with compact cassette tapes following in 1966; it is for these that the company is most widely noted. TDK used to manufacture an extensive portfolio of magnetic and optical media, including several formats of videotape and blank CD-R and recordable DVD discs until it licensed the rights to do so to Imation. Imation also now manufactures USB flash drives under this license.