Abraham Hyatt Smith (February 5, 1814 – October 16, 1892) was an American lawyer, Democratic politician, and Wisconsin pioneer.
In 1842, he moved to Janesville, Wisconsin Territory, where he built a mill and practiced law.
Smith served as a delegate to the first Wisconsin Constitutional Convention of 1846 as a representative of Rock County.
In 1848, President James Polk appointed Smith as the United States District Attorney serving until 1849.
In 1853, Smith was elected first Mayor of Janesville after its incorporation as a city.