Ad-Damazin (Arabic: الدمازين, romanized: Ad-Damāzīn) is the capital city of Blue Nile, Sudan.

Ad-Damazin is served by a terminal station of a branch line of the national railway network.

The city lies west of the Nile river and northwest of the Roseires reservoir.

[1] Like other parts of the Sahel, Ad-Damazin has a hot semi-arid climate (Köppen climate classification BSh), with a wet season and a dry season and the temperature being hot year-round.

Ad-Damazin receives 712.9 millimetres (28.07 in) of rain over 70.7 precipitation days, with a distinct wet and dry season like the rest of the Sahel.