Overview

Last seen: Approximately 11:00 p.m., February 18, 2023
Location: 800 block of Minnesota Street, Oshkosh, Wisconsin
Age when missing: 36
Height: 5 feet 5 inches
Weight: Approximately 156 pounds
Hair: Brown
Eyes: Green
Last known clothing: Dark-colored sweatshirt and black yoga pants
Personal item: Light blue and pink purse
Status: Missing
Reward: $10,000 for information leading to her safe return
NamUs: MP100504

Main Circumstances

Anderson was last seen at or walking away from her residence late on February 18, 2023. She was reported missing to Oshkosh police on the morning of February 20.

Investigators initially said the circumstances did not appear suspicious and later said they did not believe criminal activity was involved. Police worked with Anderson’s family, followed information received in the investigation and used a drone to search around her last known location. Her family appealed for information and asked nearby residents to examine surveillance-camera footage.

No publicly confirmed subsequent sighting has been identified in the sources reviewed for this article, and Anderson remains listed as missing.

Detailed Case Breakdown

Nina Anderson Missing Person Case: Woman Remains Missing After Disappearing From Oshkosh in 2023

Nina M. Anderson was 36 years old when she disappeared from Oshkosh, Wisconsin, in February 2023. More than three years later, Anderson remains listed as missing by the Wisconsin Department of Justice, and her family’s $10,000 reward for information leading to her safe return remains public.

Nina Anderson Was Last Seen at Her Oshkosh Residence

According to the Oshkosh Police Department’s original missing-person release, Anderson was last seen at approximately 11:00 p.m. on Saturday, February 18, 2023, at her residence in the 800 block of Minnesota Street in Oshkosh.

She was described as a 36-year-old white woman, approximately 5 feet 5 inches tall and 156 pounds, with brown hair and green eyes. Anderson was reportedly wearing a dark-colored sweatshirt and black yoga pants and was carrying a light blue and pink purse.

The Wisconsin Department of Justice continues to use February 18, 2023, as her missing-since date. Some databases and secondary sources give February 19 as the date of last contact. NamUs information reproduced in case discussions lists February 19, while the original Oshkosh Police Department release specifically states that Anderson was last seen at approximately 11:00 p.m. on February 18. For that reason, February 18 is used here as the primary last-seen date.

Anderson Was Reported Missing Two Days Later

At approximately 8:44 a.m. on February 20, 2023, the Oshkosh Police Department was notified that Anderson was missing.

Police subsequently issued a public appeal asking anyone with information about her whereabouts to contact investigators. At the beginning of the investigation, police said the circumstances of her disappearance did not appear suspicious.

That statement is important because it describes investigators’ assessment at the time; it does not explain what happened to Anderson or establish why she disappeared.

Police Used a Drone to Search Near Her Last Known Location

Additional details about the investigation emerged in early March 2023.

Oshkosh Police Public Affairs/Crime Prevention Officer Kate Mann told WBAY that investigators were working closely with Anderson’s family and following information connected to the case. Police also deployed their drone team to search the area surrounding her last known location.

At that point, police said they did not believe criminal activity was involved in Anderson’s disappearance. No publicly released evidence, however, established where she went after leaving her residence.

Family members also attempted to generate information through social media. According to WBAY, relatives asked residents along Minnesota Street to review outdoor surveillance-camera footage for anything that might provide a clue.

Family Offered a $10,000 Reward

As the search continued without an apparent breakthrough, Anderson’s family offered a $10,000 reward for information leading to her safe return.

The reward was publicized in early March 2023 and remains displayed on Anderson’s current Wisconsin Department of Justice missing-person profile.

Anderson’s disappearance also entered the National Missing and Unidentified Persons System. Her NamUs case number is MP100504.

What Happened to Nina Anderson?

Publicly available information leaves a substantial gap after Anderson was last observed.

The Charley Project reports that Anderson was seen walking away from her apartment in the 800 block of Minnesota Street at approximately 11:00 p.m. and has not been heard from since. The organization lists her case simply as “Missing.”

There have been comparatively few publicly released details about where investigators believe Anderson may have gone, whether any later confirmed sightings were reported, or what evidence may have been developed after the initial searches.

No credible public law-enforcement source located for this article identifies a suspect, announces an arrest, or classifies Anderson’s disappearance as a homicide.

Latest Information on the Nina Anderson Investigation

As of September 2026, the most significant current information is that Anderson remains officially listed as missing by the Wisconsin Department of Justice. The state’s current missing-person database lists her as missing from Oshkosh, gives February 18, 2023, as the missing-since date, lists her current age as 40, and continues to advertise the $10,000 reward.

The Charley Project case file, last updated in May 2025, also continues to classify Anderson as missing. A separate missing-person case publication updated in January 2026 likewise reports that Anderson remains missing.

No later official announcement located during research for this article reports that Anderson has been found. Likewise, no credible public source reviewed here establishes that she was the victim of a homicide.

The case therefore remains a missing-person investigation based on the latest publicly available official information.

Brief Case Summary

Last seen: Approximately 11:00 p.m., February 18, 2023
Location: 800 block of Minnesota Street, Oshkosh, Wisconsin
Age when missing: 36
Height: 5 feet 5 inches
Weight: Approximately 156 pounds
Hair: Brown
Eyes: Green
Last known clothing: Dark-colored sweatshirt and black yoga pants
Personal item: Light blue and pink purse
Status: Missing
Reward: $10,000 for information leading to her safe return
NamUs: MP100504

Main Circumstances

Anderson was last seen at or walking away from her residence late on February 18, 2023. She was reported missing to Oshkosh police on the morning of February 20.

Investigators initially said the circumstances did not appear suspicious and later said they did not believe criminal activity was involved. Police worked with Anderson’s family, followed information received in the investigation and used a drone to search around her last known location. Her family appealed for information and asked nearby residents to examine surveillance-camera footage.

No publicly confirmed subsequent sighting has been identified in the sources reviewed for this article, and Anderson remains listed as missing.