As of 2003, the town had an estimated population of 5,317 and the density of 48.56 persons per km². The total area was 109.49 km².

On March 31, 2005, Ōno, along with the towns of Asaji, Inukai, Mie and Ogata, and the villages of Chitose and Kiyokawa (all from Ōno District), was merged to create the city of Bungo-Ōno.

• Noether fundamental theorem
• Noetherian group
• Noetherian modules
• Noetherian scheme
• Noetherian topological space
• Noetherian topology
• Noether ismorphism theorem
• Noether isomorphism theorems
• Noether-Lasker theorem
• Noether Lecture
• Noether Lecturer
• Noether normalisation lemma
• Noether normalization lemma
• Noether normalization theorem
• Noetheron rings
• Noether problem
• Noether's formula
• Noether's formula for algebraic surfaces
• Noether's fundamental theorem
• Noether's normalisation lemma
• Noether's normalization lemma
• Noether's problem
• Noether's theorem on rationality for surfaces
• Noether theorem on rationality for surfaces
• Noetic