Noadiah Johnson (1795 Connecticut – April 4, 1839 Albany, New York) was an American lawyer, newspaperman, and politician who served one term as a U.S. Representative from New York from 1833 to 1835.
He studied law, was admitted to the bar, and commenced practice in Delhi, New York.
He was District Attorney of Delaware County from 1825 to 1833.
Johnson was elected as a Jacksonian to the 23rd United States Congress, holding office from March 4, 1833, to March 3, 1835.
State Senator Stephen C. Johnson was his brother.