SDLT may refer to:

• Stamp Duty Land Tax, a tax on property purchase in the United Kingdom
• Digital Linear Tape: Super DLT, a data storage technology

• Alabinskaya (Samara Metro)
• Alabio
• Alabio duck
• Alabio Duck
• Alabi (surname)
• Alablanca
• Alabmama
• Al-Abnoudi
• A Lab of My Own
• Al Abr
• Al Abrams
• Al Abraq
• Al `Abraq
• Al-Abrash
• Al Abu Falasa
• Alabuga (economic zone)
• Alabugat Tatar dialect
• Alabugat Tatar language
• Al Abyaar
• Al-Abyā
• Al Abyār
• Al Abyār, Libya
• Alacaatli, Dinar
• Alacaatlı, Dinar
• Alaca, Aydintepe