TLD is top-level domain, the highest level domain in the hierarchical Domain Name System of the Internet.
TLD may also refer to:
- The Living Daylights, a film in the James Bond series
- Thermoluminescent dosimeter, a radiation dosimeter which is read by measuring the light output during a heating process
- Tuli Lodge Airport, an airport in Botswana, by IATA code
- Telefónica Larga Distancia, a subsidiary in Puerto Rico of Telefónica, a Spanish telecommunication company
- Tag Library Descriptor, A tag library descriptor is an XML document that contains information about a library as a whole and about each tag contained in the library. TLDs are used by a web container to validate the tags and by JSP page development tools.