Mary Cosby is an original cast member of Bravo’s The Real Housewives of Salt Lake City and the First Lady of Faith Temple Pentecostal Church. This biography covers her age, net worth, husband, son, church, and the controversies that surround her.
How old is Mary Cosby?
Key insights about Mary Cosby
- She is one of the original cast members of RHOSLC, known for her distinctive fashion and unfiltered opinions.
- She serves as a spiritual leader and First Lady of Faith Temple Pentecostal Church in Salt Lake City.
- She has been married to Robert C. Cosby Sr. for over 25 years.
- Her son, Robert Cosby Jr., died on February 23, 2026 at age 23 after a long history of sobriety struggles and an overdose.
- Cosby describes her marriage as an “arranged marriage” mandated by her grandmother’s will, though evidence suggests the grandmother opposed the union.
- Serious allegations have been made that Faith Temple is a cult; Cosby denies them.
- Her extravagant lifestyle — designer wardrobe, multiple properties across five states — is frequently featured on the show.
Mary Cosby fact table
| Attribute | Details |
|---|---|
| Full Name | Mary Martha Cosby |
| Born | October 17, 1972 |
| Age | 53 (as of 2025) |
| Occupation | Television personality, spiritual leader |
| Spouse | Robert C. Cosby Sr. (married September 1998) |
| Children | 1 son – Robert Cosby Jr. (2002–2026) |
| Net Worth | At least US$5 million (inheritance, not publicly verified) |
| Church | Faith Temple Pentecostal Church, Salt Lake City |
| TV Show | The Real Housewives of Salt Lake City (Bravo) |
What is Mary Cosby’s net worth?
Mary Cosby’s net worth is estimated to be at least US$5 million. According to reports, she inherited her grandmother Rosemary’s estate, which included the church, restaurants, and hair salon chains. However, those businesses are no longer active. Her primary source of income today is believed to be donations from the congregation of Faith Temple. Cosby’s wealth is displayed through her designer wardrobe — she once gifted co-stars Louboutins worth about $1,300 each — and multiple properties across Utah, Nevada, New York, Indiana, and Florida.
Exact figures remain unverified, and estimates vary. No official financial disclosure has been made by Cosby or Bravo.
Who is Mary Cosby’s husband?
Mary Cosby has been married to Robert C. Cosby Sr. since September 1998. He is her step-grandfather and is approximately 20 years older than her. Cosby describes the union as an “arranged marriage” mandated by her late grandmother Rosemary’s will, though public records and Reddit discussions suggest Rosemary actually opposed the marriage and never intended for Robert to marry Mary.
Mary Cosby husband age
Robert C. Cosby Sr.’s exact age is not publicly confirmed, but given Mary was born in 1972 and he is about 20 years older, he is estimated to be in his early 70s as of 2025.
Allegations against Robert Cosby Sr.
Robert Cosby Sr. faces sexual assault allegations for allegedly drugging a woman’s drink. These claims have been discussed extensively on Reddit and were explored in a TLC docuseries. No criminal charges have been confirmed in publicly available records. Cosby has denied all cult allegations regarding the church, but she has not publicly addressed the assault claims against her husband.
The sexual assault claims against Robert C. Cosby Sr. are based on unverified reports and Reddit discussions. No conviction or formal charge has been located in public court records.
Does Mary Cosby have a son?
Yes, Mary Cosby has one son, Robert Cosby Jr., who was born in 2002. He tragically died on February 23, 2026 at age 23 from an overdose after a long struggle with sobriety. Cosby had been open about supporting her son’s journey on RHOSLC. His death was widely reported by US Magazine and other outlets.
What church does Mary Cosby lead?
Mary Cosby is the First Lady of Faith Temple Pentecostal Church in Salt Lake City. She is not an ordained pastor but holds the title through her husband Robert Sr.’s authority. The church has been the subject of serious allegations that it operates as a cult. Former members and fellow RHOSLC cast members — including Heather Gay and Lisa Barlow — have publicly questioned the church’s practices. Cosby has called the cult allegations “false” and “ridiculous.”
Despite claims that Cosby inherited operational businesses from her grandmother, reports indicate those businesses are no longer active. Her primary income source is believed to be congregation donations, though the exact financial structure of Faith Temple is not publicly documented.
Is there a documentary about Mary Cosby?
Yes, a three-part TLC docuseries titled The Cult of the Real Housewife was released in January 2026. It features interviews with former church members and family members, focusing on the cult allegations against Faith Temple and the sexual assault allegations against Robert Cosby Sr. The series is available on TLC and platforms like YouTube.
What is the timeline of Mary Cosby’s life?
- 1972: Born October 17 in Salt Lake City, Utah.
- 1998: Married Robert C. Cosby Sr. in September.
- 2002: Son Robert Cosby Jr. is born.
- 2020: Joins the cast of RHOSLC as an original member.
- 2021: Church controversies emerge on the show; Cosby’s role as First Lady is highlighted.
- 2025: Returns as a full-time housewife in Season 5; Season 6 premieres September 2025.
- January 2026: TLC docuseries The Cult of the Real Housewife airs.
- February 23, 2026: Son Robert Cosby Jr. dies at age 23.
What do we know for sure about Mary Cosby?
| Established information | Information that remains unclear |
|---|---|
| Full name: Mary Martha Cosby | Net worth: no official verification; estimates vary. |
| Date of birth: October 17, 1972 | Church finances and membership size are not publicly confirmed. |
| Marriage to Robert C. Cosby Sr. in September 1998 | Exact timeline of her mother’s estrangement (if any) is not fully documented. |
| One son, Robert Cosby Jr. (2002–2026) | The veracity of the arranged marriage claim is disputed by evidence. |
| Original cast member of RHOSLC | Whether the church is a cult remains a matter of allegation, not legal determination. |
| First Lady of Faith Temple Pentecostal Church | Details of Robert Sr.’s sexual assault allegations have not been adjudicated. |
Why is Mary Cosby a polarizing figure?
Mary Cosby blends two worlds that rarely intersect: reality television and religious leadership. As a housewife on RHOSLC, she displays a luxurious lifestyle — designer clothes, multiple homes, and expensive gifts — while also serving as the First Lady of a Pentecostal church. This duality has attracted both interest and criticism. Her blunt honesty on the show divides viewers; some see it as refreshing authenticity, others as harshness. Reddit discussions often focus on whether she shows empathy or puts her ego aside. Her son’s addiction and death, along with her husband’s legal troubles, add layers to her public persona.
What do fans and official sources say about Mary Cosby?
“She actually does have empathy and unselfishness and is able to put her ego aside.”
— Reddit user on r/BravoRealHousewives
“At home, Mary remains committed to supporting her son Robert Jr.’s sobriety and navigates life after the passing of her estranged mother.”
— BravoTV.com
Other official sources include Wikipedia, South China Morning Post, YouTube, Reddit, US Magazine, and IMDb. Cosby has denied all cult allegations.
What is Mary Cosby’s story?
Mary Cosby is a television personality and church leader whose life has been marked by family complexity, financial inheritance, public controversy, and personal tragedy. She remains a full-time cast member of RHOSLC, and her son’s death has brought new attention to her family’s struggles. As of 2025, she continues to appear on the show. For more on other reality stars facing legal and personal battles, read about Teresa Giudice – Net Worth, Prison, Husband & 2025 News and Danny Masterson – Conviction, Sentence, and Appeal.
Frequently asked questions about Mary Cosby
What do Reddit users say about Mary Cosby?
On Reddit, fans discuss her personality, empathy, and unique role on RHOSLC. Some criticize her behavior while others defend her authenticity.
How old is Mary Cosby’s husband?
Robert Cosby Sr.’s exact age is not publicly confirmed, but he is estimated to be in his early 70s (approx. 20 years older than Mary).
Is Mary Cosby on Instagram?
Yes, her Instagram handle is @mary_m_cosby, where she shares lifestyle, faith, and promotional content.
What is Mary Cosby’s relationship with other RHOSLC cast members?
She has had conflicts with cast members such as Jen Shah and Lisa Barlow, but has also formed alliances. Her relationship with the group remains dynamic.
Did Mary Cosby inherit her wealth?
Yes, she inherited her grandmother’s estate, which included the church, restaurants, and hair salons. Those businesses are no longer active.
How many properties does Mary Cosby own?
She reportedly owns multiple properties across five U.S. states: Utah, Nevada, New York, Indiana, and Florida.
Is Mary Cosby ordained as a pastor?
No, she is not an ordained pastor. She holds the title of First Lady through her husband Robert Sr.
When did Mary Cosby return to RHOSLC?
She returned as a “friend of the housewives” in Season 4 and became a full-time housewife again in Season 5. Season 6 premiered in September 2025.
What is the name of the docuseries about Mary Cosby?
The docuseries is called The Cult of the Real Housewife, released on TLC in January 2026.
When did Mary Cosby’s son die?
Robert Cosby Jr. died on February 23, 2026, at age 23, from an overdose after a long struggle with sobriety.
Amelia Grant is Technology & Media Editor at NewsPrism.co.uk, covering AI, platforms, cybersecurity, consumer tech and the media landscape.