Nicholas Bernard Mangione (/ˌmændʒiˈoʊni/ ⓘ MAN-jee-OH-nee,[1] Italian: [manˈdʒoːne];[2] February 17, 1925 – November 2, 2008) was an American real estate developer.

[7] His father, Luigi, born in Enna, Sicily,[8] was illiterate and worked for Baltimore's water department until he died of pneumonia when Nicholas was 11 years old.

[3] Mangione sold newspapers and peddled shopping bags at the Belair Market while he attended St. James the Less Commercial School.

In January 1943, a month before Mangione turned 18 years old, he enlisted in the United States Navy and reported to the destroyer USS Caperton.

"[17] Turf Valley later became the center of a boycott after Mangione's nephew and resort manager Frederick B. Grimmel Jr. called a Black NAACP member the N-word during a taped conversation;[18] Mangione was reluctant to fire his nephew, first suspending Grimmel with pay but eventually firing him after pressure from the Black community increased.

[17] As part of Grimmel's removal, Mangione signed an agreement calling on the U.S. Department of Justice's Community Relations Office to conduct sensitivity training for club employees and for the Howard County Office of Human Rights to investigate whether the country club was engaging in racially discriminatory hiring practices.

[19] Grimmel was rehired several months after his firing, and Mangione later told The Baltimore Sun that he believed he was unfairly criticized by the NAACP.

[17] Mangione alleged that people were skeptical of his success as a businessman because they assumed he must have received money from the Italian Mafia.

[9] In December 1986, Mangione purchased the 474-acre Hayfields farm in Hunt Valley, Maryland, for a price between $4 and $5 million, with the intention of developing a 1,600-house community.