Overview

• Full name: Marilyn Dennis
• Age at disappearance: 43 years old
• Date of birth: August 30, 1967
• Last seen: August 23, 2011, according to secondary missing-person records
• Alternative disappearance date: September 27, 2011, reported in California missing-person information cited by The Charley Project
• Last known location: Oakland, Alameda County, California
• Race: Black/African American
• Sex: Female
• Height: 5 feet 8 inches
• Weight: Approximately 250 pounds
• Hair color: Black
• Eye color: Brown
• Case classification: Missing person
• Investigating agency: Oakland Police Department
• Police case number: 11-047634
• Current status: Listed as missing in California Department of Justice records; no publicly confirmed resolution located

Circumstances: Marilyn Dennis disappeared from Oakland in 2011. She reportedly maintained consistent communication with her daughter before that contact abruptly stopped. The reason for her disappearance remains unknown, and no verified public evidence establishes that she was the victim of a homicide.

Detailed Case Breakdown

Marilyn Dennis Missing Since 2011 in Oakland, California: The Unsolved Disappearance of a 43-Year-Old Mother

More than 15 years after Marilyn Dennis disappeared from Oakland, California, questions remain about what happened to the 43-year-old woman whose contact with her daughter reportedly stopped without explanation.

Marilyn was last seen in August 2011, according to missing-person records. Her disappearance has received relatively little public attention, and available information provides few details about her final known movements or the circumstances that led to her disappearance.

Despite the passage of time, Marilyn remains listed in California’s missing-person records. Her case is a reminder that behind every missing-person report is an individual whose absence leaves unanswered questions for loved ones and investigators.

Case Summary

• Full name: Marilyn Dennis
• Age at disappearance: 43 years old
• Date of birth: August 30, 1967
• Last seen: August 23, 2011, according to secondary missing-person records
• Alternative disappearance date: September 27, 2011, reported in California missing-person information cited by The Charley Project
• Last known location: Oakland, Alameda County, California
• Race: Black/African American
• Sex: Female
• Height: 5 feet 8 inches
• Weight: Approximately 250 pounds
• Hair color: Black
• Eye color: Brown
• Case classification: Missing person
• Investigating agency: Oakland Police Department
• Police case number: 11-047634
• Current status: Listed as missing in California Department of Justice records; no publicly confirmed resolution located

Circumstances: Marilyn Dennis disappeared from Oakland in 2011. She reportedly maintained consistent communication with her daughter before that contact abruptly stopped. The reason for her disappearance remains unknown, and no verified public evidence establishes that she was the victim of a homicide.

Background: Who Was Marilyn Dennis?

Marilyn Dennis was born on August 30, 1967. She was 43 years old when she disappeared from Oakland, California, in 2011, just days before her 44th birthday.

Public missing-person records identify Marilyn as a Black woman with black hair and brown eyes. She stood approximately 5 feet 8 inches tall and weighed around 250 pounds at the time she went missing.

One of the few publicly reported personal details about Marilyn concerns her relationship with her daughter. According to a missing-person awareness account published by The Charley Project’s founder, Marilyn had maintained constant contact with her daughter before her disappearance.

That communication reportedly stopped suddenly.

The interruption was particularly concerning because it represented a significant change from Marilyn’s usual pattern of contact.

Beyond this information, little verified biographical material is publicly available. Details about her employment, residence, education, other family relationships, and daily activities have not been established through the sources located for this article.

Those gaps make it difficult to reconstruct Marilyn’s life immediately before she disappeared. They also demonstrate how little information about her circumstances has reached the public.

The Disappearance of Marilyn Dennis in August 2011

Marilyn was last seen in Oakland on August 23, 2011, according to missing-person records reproduced by secondary databases.

However, an important discrepancy exists concerning the date associated with her disappearance.

The Charley Project’s founder noted in an August 10, 2021, article that California Department of Justice information gave September 27, 2011, as the disappearance date, while NamUs information gave August 23, 2011.

The author suggested that August 23 might have been the last-seen date and September 27 the reporting date. This was explicitly an interpretation rather than a confirmed investigative finding.

Consequently, August 23 is the publicly reported last-seen date used in this article, but the discrepancy should not be treated as officially resolved.

At the time of her disappearance, Marilyn was reportedly wearing a white T-shirt, blue jeans, and white shoes.

The available public accounts do not establish exactly where in Oakland she was last observed, whom she was with, or what she intended to do that day.

There is also no verified public account establishing whether she disappeared while traveling, leaving a residence, visiting someone, or conducting an ordinary daily activity.

The most significant reported behavioral change remains the abrupt end of communication with her daughter.

That change raised concerns about Marilyn’s welfare, although it does not independently establish what happened to her.

Investigation History and Available Evidence

Oakland Police Department Investigation

The Oakland Police Department is identified by the California Department of Justice as the law enforcement agency associated with Marilyn’s missing-person case.

Her official police reference number is 11-047634.

The existence of this case number establishes that Marilyn’s disappearance was entered into law enforcement records. However, the publicly accessible sources located for this article provide little detail about investigative actions undertaken after she was reported missing.

No verified public investigative chronology was located describing the initial interviews, neighborhood searches, records examinations, or follow-up investigative steps.

This lack of publicly accessible information should not be interpreted as proof that investigators failed to conduct those activities. It means the details could not be independently confirmed.

The Sudden Loss of Family Contact

The reported interruption in communication between Marilyn and her daughter is one of the most notable details in the available case history.

Before disappearing, Marilyn reportedly communicated with her daughter consistently.

Afterward, that contact stopped.

This circumstance may be relevant when evaluating whether Marilyn’s disappearance was voluntary or involuntary, but the public information does not establish the reason for the communication breakdown.

No verified statement from her daughter describing the final conversation, its exact date, or the contents of that communication was located.

Physical and Forensic Evidence

The publicly available information reviewed does not establish whether investigators recovered physical evidence connected to Marilyn’s disappearance.

In particular, no verified case-specific public disclosures were located concerning recovered personal belongings, surveillance footage, vehicle evidence, telephone records, forensic samples, or other physical evidence.

Similarly, no publicly confirmed case-specific reports were located documenting DNA testing, forensic genetic genealogy, or the identification of unidentified remains as Marilyn Dennis.

The absence of publicly disclosed forensic findings does not establish that investigators possess no evidence. It simply limits what can responsibly be reported.

Suspects and Criminal Proceedings

No publicly confirmed suspect, named person of interest, arrest, criminal charge, or court proceeding directly associated with Marilyn’s disappearance was located.

There is also no verified public evidence establishing that Marilyn was murdered.

Her case must therefore continue to be described as a missing-person investigation rather than a confirmed homicide.

Theories and Unresolved Questions

Marilyn’s disappearance raises important questions, but the available evidence does not support a definitive explanation.

Did Marilyn Leave Voluntarily?

One possibility in an unexplained disappearance is that a person intentionally leaves their previous circumstances.

However, there is no verified public evidence establishing that Marilyn planned to leave Oakland, relocate, or deliberately end communication with her family.

Her reported pattern of consistent contact with her daughter makes the sudden silence noteworthy, but it cannot independently prove that her departure was involuntary.

Could Marilyn Have Experienced an Emergency?

An accident, medical emergency, or other unexpected event is another general possibility in a missing-person investigation.

No publicly confirmed evidence connects Marilyn to a particular accident, hospital admission, or medical incident.

This remains a hypothetical explanation, not a documented investigative finding.

Was Foul Play Involved?

The possibility of foul play cannot be excluded solely from the limited public information.

Nevertheless, no verified public evidence establishes an abduction, assault, homicide, or involvement by a particular individual.

Suggesting a specific offender, motive, or criminal scenario would go beyond the documented facts.

Questions That Remain Unanswered

Several central questions remain unresolved: Where exactly was Marilyn last seen? Who last had confirmed contact with her? What was the date of her final communication with her daughter? Why do public sources report different disappearance dates? Were there witnesses or physical evidence that have not been publicly disclosed?

Answers to these questions could help clarify Marilyn’s final known movements and the circumstances surrounding her disappearance.

Until further evidence becomes available, none of the possible explanations should be presented as an established conclusion.

Latest Publicly Available Investigative Updates

August 10, 2021: Renewed Public Awareness

On August 10, 2021, The Charley Project’s founder published a missing-person awareness article featuring Marilyn Dennis.

The article highlighted the approaching tenth anniversary of her disappearance, described her physical characteristics and reported clothing, and drew attention to her previously consistent communication with her daughter.

It also acknowledged the conflicting disappearance dates appearing in missing-person information.

This publication was an awareness effort, not a documented investigative breakthrough.

California Department of Justice Missing-Person Listing

The California Department of Justice continues to display Marilyn Dennis in its publicly accessible missing-person search records.

The listing identifies her date of birth, race, sex, investigating agency, police contact number, and case reference.

The continued availability of the listing indicates that her case remains represented in the state’s missing-person database. It does not, by itself, confirm whether law enforcement has undertaken recent investigative activity.

Status as of October 27, 2026

As of this review, no publicly confirmed recent investigative developments were located establishing that Marilyn has been found or that her disappearance has been resolved.

No verified recent announcement was located concerning an arrest, identification of remains, forensic breakthrough, or public cold-case review specifically involving Marilyn Dennis.

There is also no confirmed public information establishing that genetic genealogy has produced a lead in her case.

Although missing-person databases and awareness websites may continue to display or update Marilyn’s information, such activity should not be mistaken for a new investigative development.

Conclusion: The Continuing Search for Marilyn Dennis

Marilyn Dennis was 43 years old when she disappeared from Oakland, California, in 2011.

The limited public record leaves substantial questions about her final known movements, the interruption in contact with her daughter, and the investigative efforts undertaken since her disappearance.

What remains clear is that her disappearance has not been publicly resolved through the sources reviewed.

More than fifteen years later, even a seemingly minor detail from August or September 2011 could potentially help investigators reconstruct the events surrounding her disappearance.

Anyone who remembers seeing Marilyn, communicating with her, or observing something relevant to her last known whereabouts is encouraged to contact the Oakland Police Department.

Information should be shared with investigators rather than presented as an unverified accusation or circulated as an established fact.

Oakland Police Department: (510) 238-3641

Case number: 11-047634

Marilyn Dennis deserves to be remembered as more than a missing-person record. Her disappearance remains an unanswered question, and credible information could still help bring clarity to her case.