The Short Answer
Traditional bathroom vanities are 30-32 inches tall — a holdover from furniture proportions. Comfort height vanities are 34-36 inches, similar to kitchen countertop height, which many adults find more ergonomic. The right height depends on user height — taller adults prefer 35-36 inches; shorter users may find 30-32 inches more comfortable. For households with both adults and children, 32-34 inches is often the best compromise. ADA-compliant accessible vanities are typically 34 inches.