Seah is a surname in various cultures. Its languages of origin include Chinese and Muscogee.
Seah may be a Latin-alphabet spelling of multiple Chinese surnames, based on their pronunciation in various Southern Min dialects, listed in the table below. Southern Min spellings of Chinese surnames are often found in Malaysia and Singapore, where many descendants of Chinese migrants can trace their roots to the Fujian and Guangdong provinces of China where various Southern Min dialects are spoken.
Seah may also be name in other cultures as well. For example, it was a Muscogee name, more commonly spelled Sioh.
The 2010 United States census found 170 people with the surname Seah, making it the 105,079th-most-common name in the country. This represented an increase from 133 (120,330th-most-common) in the 2000 Census. In both censuses, more than eight-tenths of the bearers of the surname identified as Asian, and roughly one tenth as non-Hispanic White.