Deafness Prevalence: Global and Country-Specific Estimates

Deafness prevalence varies by definition (threshold, laterality), methodology, and population.

Key Estimates

• WHO: >1.5 billion people with hearing loss (≥20 dB); 430 million with disabling loss (≥35 dB better ear).
• US (NIH/NIDCD): ~1 in 500 (0.2%) functionally deaf; ~15% adults (37.5M) have some hearing trouble.
• UK: ~1.1% severe/profound deafness (RNID).
• Australia: ~0.8% (Deafness Forum).
• Global Disparity: Higher in low-income regions (infectious causes, ototoxicity, noise, limited care).

Definitions Matter

• "Deaf" (cultural/identity, usually profound loss, sign language).
• "Hard of hearing" (mild–severe loss, oral communication).
• "Hearing loss" (audiometric threshold).

Trends

Rising due to aging populations, noise exposure, ototoxic drugs. WHO projects 2.5 billion with hearing loss by 2050.