The person at the center of this case
Katherine Ann Demianczyk
Missing Person · Open
7 years waiting · since 2018
Missing Person: Katherine Ann Demianczyk
Justice for Katherine Ann Demianczyk — the trail went cold in 2018, but the truth hasn't.
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Key leads to think about
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person
Lead #1What was Katherine's mental and emotional state in the days leading up to her disappearance?
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contact
Lead #2Who was Katherine in contact with on or around November 20, 2018?
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clue
Lead #3Were there any unusual activities, plans, or changes in behavior reported by family or friends before she went missing?
Katherine Ann Demianczyk, a 25-year-old woman, disappeared in Philadelphia on November 20, 2018, just days before Thanksgiving after last being seen by her mother. Nearly six years later, the circumstances of her disappearance remain unclear, and investigators have not determined whether she left voluntarily or came to harm. Anyone with information about Katie's whereabouts or what happened to her is urged to contact the Philadelphia Police Department's Special Victims Unit.
Case
#2170
Philadelphia Police Department - Special Victims Unit
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More leads to consider
Beyond the top three above — each detail below could be the thread that pulls this case open.
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witness
Lead #4Are there any witnesses who saw Katherine after November 20, 2018, or have information about her movements?
Have information about any of these leads?
Even the smallest detail could be the key to solving this case.
Official wording
Source Narrative
NamUs case MP73198. Missing person: Katherine Ann Demianczyk.
Last known contact: 2018-11-20 in Philadelphia, Philadelphia, PA. Circumstances: Katie was last seen by her mother two days before Thanksgiving.
Demographics: 25 years, Female, White / Caucasian. Physical description: 5 ft 0 in, 100 lbs, hair: Blond/Strawberry, eyes: Blue.
Investigating agency: Philadelphia Police Department - Special Victims Unit | 20-02-040490 | 2020-08-31.
Timeline of Events
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2018-11-20
Last Seen by Mother
Katherine Ann Demianczyk was last seen by her mother in Philadelphia, two days before Thanksgiving 2018.
Key Locations
Interactive map showing important locations related to this case
Case Information
Incident:November 20, 2018
Last Updated:August 7, 2026
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Any information, no matter how small, could be crucial to solving this case.
Phone: 2156863093
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Case Information
Incident:November 20, 2018
Last Updated:August 7, 2026
Have Information?
Any information, no matter how small, could be crucial to solving this case.
Phone: 2156863093
You can remain anonymous