known for his newspaper, Freedom's Journal.
He moved from the United States to govern the Maryland section of an African-American colony in Liberia, dying there in 1851. Russwurm was born in Port Antonio, Jamaica to an English merchant father and an unknown black woman. The family stayed in Jamaica until 1807 when Russwurm was sent to Quebec. In 1812 father and son moved to Portland Maine where the elder Russwurm married widow Susan Blanchard in 1813.
Blanchard (now Russwurm) insisted her husband grant "John Brown" as he was then known his full birth name. His father did so and the now named "John Brown Russwurm" lived with his father stepmother and her children from a previous marriage, accepted as part of the family. The elder Russwurm died in 1815 but his son stayed close to his stepmother, even after she re-married to become Susan Hawes. The John B. Russwurm House in Portland was owned by the family and is listed on the National Register of Historic Places.
Russwurm attended Hebron Academy in Maine, focusing on his studies to finish his education and earning the nickname "Honest John". Graduating in his early twenties, he taught at an African-American school in Boston. Several years later he re-located back to Maine to live with his stepmother and her new husband, and they helped Russwurm pay for further education when he enrolled in Bowdoin College in 1824. Upon graduation in 1826 Russwurm became the first African American to graduate from Bowdoin College and third African American to graduate from an American college.
Russwurm moved to New York City in 1827. On March 16 of that year, Russwurm, along with his co-editor Samuel Cornish published the first edition of Freedom's Journal an abolitionist newspaper dedicated to opposition of slavery. Freedom's Journal was the first newspaper in the United States to be owned, operated, published and edited by African Americans.
Upon becoming senior editor in September 1827 Russwurm used his position to change the paper's initially negative stance on the colonialization of Africa by African Americans to a positive.
Upon emigrating to Liberia Russwurm started work as the colonial secretary for the American Colonization Society between 1830 and 1834. He worked as the editor of the Liberia Herald, though he resigned his post in 1835 to protest America's colonization policies. Russwurm also served as the superintendent of education in Liberia's capital, Monrovia.
In 1836 he became the first black governor of Maryland in Africa later part of Liberia a post he held until his death encouraging the immigration of African-Americans to Africa and supporting agriculture and trade. During his time in Liberia Russwurm learned several of the native languages, encouraging trade and diplomatic relations with neighboring countries as well as whites.