HTX may refer to:

• Hashitoxicosis
• Heart transplantation
• Heat exchanger
• Hemitoxin
• Higher Technical Examination Programme of the Danish educational system
• Homothorax
• Houston, Texas, United States
• Middle Hittite language, an extinct language of Anatolia
• ZIC3, a protein
• HyperTransport Expansion connector, part of the HyperTransport specification

• NoHo Arts District, Los Angeles, California
• Nohoch Nah Chich
• NoHoHon-Zoku
• Nohoi oron
• No Holds Barred
• No-holds-barred
• No Holds Barred (1952 film)
• No holds barred (disambiguation)
• No Holiday for Inochkin
• Noholme
• Noh Omar
• No homo
• No Hook
• No Hope, No Fear
• No Hope, No Future
• No host bar
• Nohoval
• Noh Poe
• Nohra al-Shalouhi military base
• Noh Seon-Yeong
• Noh Seon-yeong
• Noh Seon Yeong
• Noh Seon-Young
• Noh Seung-yul
• Noh Shah