LDH is an acronym which may refer to:
- Lactate dehydrogenase, an enzyme in a wide range of plants, animals and other organisms; is measured as part of the complete blood test
- Large diameter hose, a type of fire hose
- Layered double hydroxides, a class of layered materials composed of positively charged atomic layers and charge balancing anions located in the interlayer region
- Letters Digits Hyphen rule in RFCs defining DNS: RFC 1034, RFC 1035, RFC 1123, RFC 3696, RFC 5890
- Human Rights League (France)
is a Japanese entertainment company. Its president is Hiro, the leader of the Dance & vocal group Exile. The name "LDH" is an acronym of "Love + Dream + Happiness".
The company operates several boy bands and girl groups and a dance school named "EXPG".