Alonzo Sessions (August 4, 1810 – July 3, 1886) was an American politician from the U. S. state of Michigan.
In 1831 he moved to Bennington and worked in a store as a clerk for two years receiving $10 a month and board.
The next winter he taught school in Dayton, Ohio until 1835 when he bought a team and came through his land on the south side of the Grand River.
In 1856, Sessions was elected as a Republican from Ionia County (2nd district) to the Michigan House of Representatives and served from 1857-62.
In 1872 he served as a Presidential Elector for Michigan casting his vote for incumbent U. S. President Ulysses S. Grant.