Jonathan Pearson was born in New Hampshire in 1813, the son of Caleb Pearson and Hetty Libby. Pearson moved to Schenectady in 1831 and began attending Union College early in 1832. He graduated in 1835. After leaving Schenectady briefly to teach in Pennsylvania, Pearson returned to Union College in the fall of 1836 to teach; he would remain at Union for nearly fifty years. Pearson also served as Union College's Librarian from around 1839 until 1886, and as Acting Treasurer (1851-1854) and Treasurer (1854-1883). Pearson developed a keen interest in the history of his adopted city and became a prominent historian in the area. He wrote a number of published works about the history of Schenectady and Albany. Pearson married Mary Lord Hosford, of Albany, in 1841. The couple had three sons, Henry, John, and William. Pearson died in 1887 and is buried in Schenectady's Vale Cemetery, in the Union College Plot.