Who is the last elected whig president?

At the federal level, it was probably President Zachary Taylor in 1849. The Whig party operated in the USA during the period from the 1830s to the mid-1850s. It was briefly influential, but by the mid-1850s, it was almost totally defunct. The last Whig to serve as a US president was Millard Fillmore, from 1850-1853; he was not elected to that office, however. He was Zachary Taylor's vice president and assumed the presidency when Taylor (also a Whig) suddenly died. In 1851, Fillmore appointed the only Whig Supreme Court Justice, Benjamin R. Curtis.

In the United States, the last member of the Whig Party to be elected to the office of US President was Millard Filmore. He was the 13th US President and served from 1850 to 1853. His home State was New York.