quality:correction
Early life

Greeley was born on February 3, 1811, on a small farm about five miles from Amherst, New Hampshire. He could not breathe for the first twenty minutes of his life. It is suggested that this deprivation may have caused him to develop Asperger's syndrome —some of his biographers, such as Mitchell Snay, maintain that this condition would account for his eccentric behaviors in later life. His father's family was of English descent, and his forebears included early settlers of Massachusetts and New Hampshire, while his mother's family descended from Scots-Irish immigrants from the village of Garvagh in County Londonderry who had settled Londonderry, New Hampshire. Some of Greeley's maternal ancestors were present at the siege of Derry during the Williamite War in Ireland in 1689.

Greeley was the son of poor farmers Zaccheus and Mary (Woodburn) Greeley. Zaccheus was not successful, and moved his family several times, as far west as Pennsylvania. Horace attended the local schools and was a brilliant student.

Seeing the boy's intelligence, some neighbors offered to pay Horace's way at Phillips Exeter Academy, but the Greeleys did not want to accept charity. In 1820, Zaccheus's financial reverses caused him to flee New Hampshire with his family lest he be imprisoned for debt, and settle in Vermont. Even as his father struggled to make a living as a hired hand, Horace Greeley read everything he could—the Greeleys had a neighbor who let Horace use his library. In 1822, Horace ran away from home to become a printer's apprentice, but was told he was too young.

In 1826, at age 15, Greeley was made a printer's apprentice to Amos Bliss, editor of the Northern Spectator, a newspaper in East Poultney, Vermont. There, he learned the mechanics of a printer's job, and acquired a reputation as the town encyclopedia, reading his way through the local library. When the paper closed in 1830, the young man went west to join his family, living near Erie, Pennsylvania. He remained there only briefly, going from town to town seeking newspaper employment, and was hired by the Erie Gazette. Although ambitious for greater things, he remained until 1831 to help support his father. While there, he became a Universalist, breaking from his Congregationalist upbringing.