Charlotte Bloomberg (née Rubens) was the mother of Michael Bloomberg, the prominent American businessman, philanthropist, and former Mayor of New York City. Born in 1909 in Boston, Massachusetts, to Russian Jewish immigrant parents, she grew up in a working-class family during the early 20th century. She attended local public schools, including Girls' Latin School, and worked as a bookkeeper before her marriage. In 1934, she married William Henry Bloomberg, an accountant of Lithuanian Jewish descent, and the couple settled in the Brighton neighborhood of Boston, where they raised their two sons, Michael (born 1942) and David (born 1947). As a homemaker, Charlotte was known for her strong work ethic, frugality, and unwavering support for her family's ambitions, particularly encouraging Michael's early interest in business and public service. Throughout her life, she maintained a close relationship with her son Michael, offering guidance and emotional support as he built his career, founding Bloomberg L.P. in 1981 and later entering politics. After William's death in 1963, she lived independently in Massachusetts and New York, remaining active and engaged with her family. Charlotte was described by Michael as a pivotal influence, instilling values of perseverance and community involvement. She lived to the age of 101, passing away in 2011, just months before her son's reelection campaign considerations. Her legacy is primarily through her role in shaping one of America's most influential figures, with no notable public career or controversies of her own.