He was the author of over 100 books, including:
- *Tarjuman-ul-Quran* (Translation of the Quran)
- *Maarif-ul-Quran* (Knowledge of the Quran)
- *Tafseer-e-Ahsan-ul-Bayan* (Commentary of the Quran)
- *Seerat-un-Nabi* (Biography of the Prophet)
- *Tarikh-e-Islam* (History of Islam)
- *Ilm-ul-Kalam* (Islamic Theology)
- *Fiqh-e-Jafaria* (Shi'i Jurisprudence)
- *Usul-e-Fiqh* (Principles of Islamic Jurisprudence)
- *Manāqib-e-Ahle Bait* (Virtues of the Household of the Prophet)
- *Faza'il-e-A'mal* (Virtues of Good Deeds)
- *Masā'il-e-Nikah* (Islamic Law of Marriage)
- *Masā'il-e-Talaq* (Islamic Law of Divorce)
- *Masā'il-e-Irs* (Islamic Law of Inheritance)
- *Al-Insān al-Kāmil* (The Perfect Man)
- *Sharḥ al-Qawa'id al-Fiqhīyah* (Commentary on Islamic Legal Rules)
- *Sharḥ al-Mawāhib al-Ladunīyah* (Commentary on the Divine Gifts)
- *Sharḥ al-Hikam al-Ṣūfīyah* (Commentary on the Sufi Wisdoms)
- *Majmū'ah al-Rasa'il* (Collection of Treatises)
- *Diwān-e-Sayid Ahmad* (Poetry)
In addition to these books, Sayyid Ahmad Dehlavi also wrote numerous articles and essays on various Islamic topics. His writings have been translated into many languages and are widely read by Muslims around the world.