Mazahir Uloom (Urdu: جامعہ مظاہر علوم، سہارنپور‎) is an Islamic seminary located in Saharanpur, Uttar Pradesh. Started in November 1866 by Sa'ādat Ali Faqīh, and developed further by Mazhar Nanautawi and Ahmad Ali Saharanpuri; it is regarded as the second most influential and major Deobandi seminary in India. The earliest graduates of the seminary include famous Hadīth scholar Khalil Ahmad Saharanpuri.