Twitter use | Pew Internet & American Life Project:
Several demographic groups stand out as having high rates of Twitter usage relative to their peers:
African-Americans — Black internet users continue to use Twitter at high rates. More than one quarter of online African-Americans (28%) use Twitter, with 13% doing so on a typical day.
Young adults — One quarter (26%) of internet users ages 18-29 use Twitter, nearly double the rate for those ages 30-49. Among the youngest internet users (those ages 18-24), fully 31% are Twitter users.
Urban and suburban residents — Residents of urban and suburban areas are significantly more likely to use Twitter than their rural counterparts.