TTD

TTD may refer to:

Places and organizations
 * Tirumala Tirupati Devasthanams, an independent trust which manages the Sri Venkateswara Temple in Andhra Pradesh, India
 * Portland-Troutdale Airport, IATA airport code
 * The Trade Desk, NASDAQ symbol

Entertainment
 * Tic-Tac-Dough, a game show
 * Transport Tycoon Deluxe, a computer game

Medicine
 * Therapeutic Targets Database, a database to provide information about the known and explored therapeutic targets
 * Trichothiodystrophy, a characteristic of Tay syndrome

Other
 * Trinidad and Tobago dollar, ISO 4217 currency code
 * Tombstone Tenzan Driver, the name of the finisher of Japanese pro wrestler, Hiroyoshi Tenzan
 * True time delay, an electrical property of a transmitting apparatus
 * Top Thrill Dragster, the second tallest and third fastest roller coaster in the world located at Cedar Point