Who is Mary Cosby from RHoSLC?
Mary M. Cosby is a renowned American Entrepreneur, Event Specialist, and television personality best known for starring as a main cast member on the reality television series, The Real Housewives of Salt Lake City, seasons 1, 2, 4, 5, and 6. In addition to her role in The Real Housewives of Salt Lake City, she has also appeared on Watch What Happens Live with Andy Cohen.
Here is the complete biography of Mary Cosby, detailing her nationality, marital status, parents, and career. Additionally, it includes information from her Wikipedia page, along with her height, weight, ethnicity, education, zodiac sign, and social media profiles.
Mary Cosby Age, Birthday
How old is she? Born on October 17, 1972, in Salt Lake City, UT, Mary is 52 years old as of 2025. She cuts her birthday cake every year on October 17, and her zodiac sign is Libra.
Personal Summary Information
| Real Name | Mary Martha Cosby |
| Date of Birth | October 17, 1972 |
| Age | 52 Years Old as of 2025 |
| Hometown | Salt Lake City, UT, United States |
| Residence | Utah, USA |
| Husband | Robert C. Cosby (m. 1998) Previously married to Dana Harris |
| Known for | The Real Housewives of Salt Lake City housewife |
| Seasons | Real Housewives of Salt Lake City Season 1, 2, 4, 5, 6 |
| Occupation | Television personality, Entrepreneur, and Event Specialist |
Early Life and Education
Marys’s father was originally from Milwaukee. Her mother, Rosalind Cazares. She is the youngest of her siblings. Mary is the granddaughter of the Late Dr. Rosemary Redmon Cosby, a Pentecostal pastor who started the Faith Temple Pentecostal Church. Regarding her eduaction, she has not revealed any information to her fans.
Mary Cosby Husband and Children
Mary married Dana Harris and later divorced before marrying her step-grandfather, Bishop Robert C. Cosby, in an “arranged marriage” that was part of her grandmother’s will; they have a son, and she serves as the First Lady of Faith Temple Pentecostal Church in Salt Lake City.
Mary Cosby Son
Robert Clinton Cosby, referred to on the show as Robert Jr., was taken into custody on Sunday in the Salt Lake City vicinity by the Taylorsville City Police Department. The 22-year-old faces charges of assault, failing to stop when instructed by an officer, criminal trespass of a residence, and three counts of breaching a jail release court order, as stated in a complaint submitted on Wednesday.
As per the court filings, Cosby was apprehended on September 5 for “a misdemeanor domestic violence incident,” involving his spouse, identified as A.S. In a podcast discussion on Tuesday, September 9, Mary mentioned that her son was “managing as best as he can” with his journey toward sobriety.
Previously, Robert Jr. had been arrested for a DUI in 2022, during which law enforcement alleged that the reality star was driving a vehicle without a license and violated traffic regulations. He subsequently accepted a plea agreement, pleading guilty to the DUI, which led to the dismissal of the other charges.
Career Background
In September 2020, Cosby was announced as a cast member of The Real Housewives of Salt Lake City. NBCUniversal executive Noah Samton stated that the show was created after they discovered Cosby and found other personalities to complete the cast.
Besides her role in The Real Housewives of Salt Lake City, she has also appeared on Watch What Happens Live with Andy Cohen. After missing the second season’s reunion special, she returned as a friend in the fourth season and resumed as a full-time cast member in the fifth season.
Mary Cosby Church
Mary’s grandmother, Rosemary “Mama” Cosby, founded Faith Temple Pentecostal Church in 1968. After her death in January 1997, a controversy erupted between her widower, Bishop Robert C. Cosby, and her children, particularly Rosalind Cazares (Mary’s mother), over the division of Rosemary’s assets, including various businesses.
In addition to that, Cosby has faced allegations from former members and fellow cast members of The Real Housewives of Salt Lake City, claiming that Faith Temple Pentecostal Church is a cult. She has dismissed these claims as “false” and “ridiculous.” In April 2021, she was charged with unlawfully providing shelter to a runaway and contributing to the delinquency of a minor, but she pleaded not guilty, and the charges were dropped in September 2022.
What is The Real Housewives of Salt Lake City All about?
The Real Housewives of Salt Lake City follows a group of women in Utah’s capital who lead lives of luxury and drama. They offer insights into their businesses and families while revealing their conflicts with one another.
Furthermore, the grand return of the Salt Lake City housewives is on Tuesday, September 16, at 9 p.m. EST. New episodes premiered on Peacock. Along with Mary Cosby, the other five participants appearing on the show, The Real Housewives of Salt Lake City Season 6, include:
- Lisa Barlow
- Heather Gay
- Angie Katsanevas
- Meredith Marks
- Bronwyn Newport
- Whitney Rose
Mary Cosby Net Worth
Mary Cosby inherited significant wealth from her grandmother, Rosemary Cosby. After marrying her husband, Robert Cosby Sr., she became the owner of this fortune. In addition to her inheritance, Mary managed her grandmother’s other businesses and successfully established her own chain of restaurants and salons. However, as of 2025, her actual net worth is not on social media, though it is estimated to be around $ 5 million or above.
Social Media
You can follow her via Instagram, TikTok, or Twitter. However, Mary doesn’t appear to have a public Facebook or Snapchat account.