William Henry Seward was born in 1801 in Florida, Orange County, New York. He was the fourth of six children born to Samuel S. and Mary J. Seward. After attending schools in Florida and Goshen, he attended Union College in Schenectady, graduating in 1820. In 1819, on a teaching sojourn to Georgia, the indignity of slavery first made an impression on him and later influenced him to become one of the most outspoken anti-slavery politicians of the time.

See biography on Seward House (Albany) website:
http://www.sewardhouse.org/biography/