TDF may refer to:

• Tigray Defense Forces, a rebel group against the Ethiopian government situated in Tigray.

• Territorial Defense Forces (Ukraine), the reserves of the Armed Forces of Ukraine

• Tab delimited files, a tabular data file format
• Télé Distribution Française, a radio clock signal transmitter in France
• TenDRA Distribution Format, a design of abstract machine
• Tenofovir disoproxil fumarate, an antiretroviral drug
• Testis determining factor, a gene (or product thereof) that results in maleness
• Tire-derived fuel, recycled chipped tires burned for fuel
• Trusted Data Format, a data tagging and protection standard used both commercially and by the United States Intelligence Community and US Department of Defense

• The Dayton Family, an American horrorcore group
• Thessaloniki Documentary Festival, a documentary film festival affiliated with the International Thessaloniki Film Festival
• Totally Dysfunctional Family, known as TDF, the group pseudonym of Eric Clapton and other musicians for a one-off 1997 album
• The Dhol Foundation, a dhol troupe from the UK

• Tour de France, a prestigious cycle race in France
• TDF Group, a major French media and telecommunications conglomerate
• Tour de Future (Australia), the Commodore 64 software production group, see Notemaker
• Theatre Development Fund, a non-profit corporation dedicated to assisting the theatre industry in New York City
• Theoretical Domains Framework, an implementation tool for Behavioural change theories
• Total dietary fiber, the indigestible portion of food derived from plants
• TDF, ticker of Templeton Dragon Fund on the New York Stock Exchange, see Companies listed on the New York Stock Exchange (T)
• The Dawood Foundation, a Pakistani non-profit foundation founded by Ahmed Dawood
• The Document Foundation, a non-profit organization that promotes open-source document handling software, particularly LibreOffice
• Target date fund, a type of mutual fund whose asset mix becomes more conservative as the target date approaches
• Tierra del Fuego, an archipelago off the southernmost tip of the South American mainland

• Tour de Force (disambiguation)

This disambiguation page lists articles associated with the title TDF.
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