Johnston was born on April 8, 1820 in New York City. He was the eldest child of John Johnston and Margaret Howard Johnston, a widow of Rhesa Howard Jr. who was the nephew of William Few, Signer of the U.S. Constitution from Georgia whose brother-in-law was U.S. Secretary of the TreasuryAlbert Gallatin. His younger brother was James Boorman Johnston, who commissioned the Tenth Street Studio Building at 51 West 10th Street between Fifth and Sixth Avenues. His sister, Margaret Taylor Johnston, was married to John Bard and together were founders of Bard College. Both of his parents were of Scottish ancestry, and his father was a prominent businessman with Boorman, Johnston, & Co. and was a co-founder of Washington Square North. His mother had four siblings who, likewise, married two grandchildren, a great-granddaughter, and a nephew of Founding Father Roger Sherman, Signer of the U.S. Constitution and the U.S. Declaration of Independence from Connecticut. Johnson grew up in Greenwich Village, where he was born, and was educated at EdinburghHigh School in Edinburgh, Scotland. He graduated from the University of the City of New York, an institution founded by his father and several other civic-minded New Yorkers, in 1839. He later studied at Yale Law School, where his classmates included Charles Astor Bristed, Daniel D. Lord, and Henry G. DeForest.
Career
After being admitted to the bar in 1843, Johnston practiced law until 1848, when he was named president of the Somerville and Easton Railroad, a position he would retain until 1877. He was the driving force behind the company's acquisition of the Lehigh and Susquehanna Railroad, and also endeavored to develop the suburbs of central New Jersey through which his railroads passed. According to his obituary, "is expenditures to secure low grades and good alignment to avoid grade crossings were far in advance of the railroad science of his time and were ridiculed by some of his competitors."
In 1851, Johnston was married to Frances Colles, the daughter of Harriet Colles and James Colles, a prominent merchant in New York and New Orleans. Their children were:
Emily Johnston, who married Robert W. de Forest, a lawyer, financier, and philanthropist.
Frances Johnston, who married Pierre Mali, the former Belgian Consul-General in New York.
In 1856, Johnston constructed the first marble mansion in New York as his residence at 8 Fifth Avenue, just north of Washington Square. Johnston was an active diarist, recording details of his travels through Europe and the United States as well as significant personal and world events, including his wedding excursion, trips with his family, a visit to Richmond, Virginia in 1865 after the surrender of the Confederate Army, and a trip west on the newly built Union Pacific Railroad. In his later years, Johnston was afflicted with creeping paralysis and withdrew from public life. He died at his Fifth Avenue estate in New York City on March 24, 1893. His funeral was held at the Scotch Presbyterian Church in New York, of which he was an elder, and he is interred at Greenwood Cemetery. In his will, he left $10,000 each to the University of the City of New York and The Metropolitan Museum of New York.
Descendants
Through his daughter Frances, Johnston is the great-great-grandfather of American slam poetTaylor Mali.