Get Away to Amherst! Amherst, NY founded in 1799...Population as of 2000: 116,510. The first schoolhouse erected by Caleb Rogers in 1812 with a Mr. Johnson as the first teacher...The first murder trial in Amherst: James Peters and Charles Thompson - convicted of murdering James Burba- executed in public in 1815...Isaac Bowman opened the first store in the area in 1812 and was appointed the first Postmaster in 1813.