Mahmud Celâleddin may refer to:
Mahmud Celaleddin Efendi (d. 1829), Ottoman calligrapher , Ottoman politician and damat Mahmud Celaleddin Pasha (1839 – 1899), Ottoman statesman and composer Damat Mahmud Celaleddin Pasha (1853–1903), Ottoman statesman, poet and writer Mahmud Celâleddin "Celâl" Bayar (1883 – 1986), Third president of Turkey