Frederick Christ Trump (October 11, 1905 – June 25, 1999) was an American real estate developer and businessman, best known as the father of U.S. President Donald J. Trump and four other children. Born in the Bronx, New York City, to German immigrant parents Frederick Trump (1869–1918) and Elizabeth Christ Trump (1880–1966), he grew up speaking German at home and was raised Lutheran. After his father's death in the 1918 influenza pandemic, young Fred worked as a delivery boy and in a fruit store to support his family, having moved to Woodhaven, Queens, in 1908. He attended Richmond Hill High School (graduated January 1923) and was self-taught in construction trades through night classes and correspondence courses, with no college education.

Trump entered the construction business in the early 1920s, building his first house in 1924 with an $800 loan from his mother and completing 19 more by 1926 in Hollis, Queens. He formed E. Trump & Son in 1927 and developed the Trump Organization from his parents' business into a major New York-area housing empire, constructing over 27,000 units in Brooklyn and Queens. Key projects included the Trump Market supermarket (1933, sold 1934), thousands of FHA-backed homes and apartments such as Beach Haven (1,350 units, 1949–1950), Shore Haven (1949), and Trump Village (3,800 units, 1963–1964, Coney Island), with expansion into military housing during and after World War II. His son Donald joined in 1968 and took over in 1971. Trump amassed significant wealth through suburban developments and apartments, providing over $1 billion (in 2018 dollars) to his children while minimizing taxes. He received the Horatio Alger Award in 1985.

On January 11, 1936, he married Mary Anne MacLeod Trump (1912–2000), a Scottish immigrant, at Madison Avenue Presbyterian Church. Their children were: Maryanne Trump Barry (born November 5, 1937 – died November 13, 2023), a federal judge; Fred Trump Jr. (October 14, 1938 – September 26, 1981), a TWA pilot who died of alcoholism; Elizabeth Trump Grau (born August 1942), a bank executive; Donald J. Trump (born June 14, 1946), U.S. President and real estate developer; and Robert Trump (born August 1948 – died August 15, 2020), a company executive.

Trump's career included several controversies: arrested at a 1927 KKK rally in Queens (charge dismissed, no evidence of membership); investigated in 1954 for profiteering on Beach Haven (no charges); probed in 1966 for Trump Village profits (deemed shrewd, no action); sued by the DOJ in 1973 for racial discrimination in rentals (settled via 1975 consent decree requiring minority hiring and advertising); arrested in 1975 for code violations; and involved in 1980s–1990s tax avoidance schemes, including overbilling and undervalued asset transfers, plus a 1990 fine for illegal casino chip loans to aid Donald's Atlantic City ventures.

Personally, Trump denied his German heritage after World War II, claiming Swedish roots to avoid anti-German sentiment, yet supported Jewish causes like Israel Bonds and synagogue land donations. A teetotaler and strict, authoritarian father, he pushed Donald as successor after Fred Jr.'s alcoholism. He engaged in philanthropy, including donations to Jamaica Hospital (Trump Pavilion), United Cerebral Palsy, National Kidney Foundation ($34M deduction), Kew-Forest School, and Salvation Army. Politically, a Republican voter, he also donated to Democrats such as Robert F. Wagner Jr. ($2,500 in 1961) and Ed Koch (over $350,000 in the 1980s). Diagnosed with mild senile dementia in 1991 and Alzheimer's in the mid-1990s, his wealth was estimated at $200 million (shared with Donald) on the 1982 Forbes 400; his estate was valued at $250–300 million at death ($1.9 million cash; properties transferred pre-death), with the will contested over competency.

He died of pneumonia at age 93 at Long Island Jewish Medical Center and was buried at Lutheran All Faiths Cemetery in Queens.