The Proteus Club records measure 3 linear feet and date from 1896 to 2024. The records are arranged in four series: Administrative Files, Programs, Photographs, and Projects.

The first series, Administrative files (1897-1996), includes the constitution, by-laws, and articles of incorporation; correspondence (including one letter from the Woman's Peace Party and one letter from the Woman's Section of the Navy League of the United States); financial reports; and a history written in 1993 by Mrs. Julian (Win) Bruner. A nearly complete set of minutes, dating from 1897-1911 and 1917-1986 forms the core of this series.

Programs (1900-2024) are arranged in three sub-series: Papers presented at meetings, Special events and celebrations, and Program yearbooks. Papers, dating primarily from the 1970s to the 2000s, are arranged chronologically. A list of authors and titles is appended. In 1913 the club presented a skit that parodied the British suffragettes, entitled "The Militant Husbandette." A booklet containing photographs and text from the performance is included in the special events and celebrations sub-series. The club's twentieth (1917) through the seventy-fifth (1971) anniversaries are represented by various speeches, skits, newspaper clippings, and papers. Program yearbooks contain lists of the club's officers, members, and papers presented.

Photographs (1937, 1980, 1996, 2003) consist of two group photos from 1937 showing members wearing clothing from the early 1800s, a 1980 photograph, photographs from the Centennial Celebration meeting on October 7, 1996, and a 2003 group photo.

The Projects series contains a recipe box and cards dating from 1909 and the Proteus Club cookbook from 1900. Both of these were used as fund raisers.