The Marta Werner papers date from 1892 to 1989 and measure 5 linear feet. The papers are arranged in seven series: Personal, Family, Community activities, Iowa State Penitentiary, Newspaper clippings, Photographs, and Artifacts.

The Personal series (1915-1989) contains annotated yearbooks from Werner's years at Webster College, travel receipts and newspaper articles from her work at the Sheaffer Pen Company, and letters to the editor Werner composed regarding Fort Madison community issues. Also included is Marta Werner's personal correspondence, including dated letters from family and friends. The bulk of the personal correspondence from 1927 to 1931 contains dated courtship letters from Marta Werner's husband, Harold Werner.

The Family series (1953-1968) includes articles about Werner's brother, Bill Brown, who died in combat during World War II, and undated correspondence and marriage programs from Werner's children and grandchildren. Newspaper clippings in this series document Werner's children, parents, and her grandmother, Maria Brown. A book about Maria Brown, Grandmother Brown's Hundred Years, completes the series. Marta Werner is mentioned on page 286 of the book as a child in Mexico.

The Community activities series (1892-1990) includes newspaper clippings documenting the community controversy over Highway 61 and Werner's research to gain admittance to the Daughters of the American Revolution. Papers related to Werner's work as a board member of the Southeast Iowa Homemaker Health Aide Service complete the series.

The Iowa State Penitentiary series (1973-1989) contains correspondence between Werner and prisoners both during and after incarceration; letters written by Werner to the parole board on behalf of prisoners; meeting minutes, programs, publications, and correspondence from prisoner organizations; albums Werner compiled containing correspondence, programs, photos, and newspaper clippings from her work at the institution; and complaint correspondence from prisoners to businesses. The albums have been disbound and placed into archival folders.

The bulk of the clippings in the Newspaper clippings series (1970-1989) are articles from the Des Moines Register or Ft. Madison Evening Democrat about the Iowa State Penitentiary that document prison issues such as administrative changes, changes in parole programs, specific prisoners' cases, sexual abuse among prisoners, and escapes and disturbances at the prison. Articles related to Catholic Workers and women in Iowa complete the series.

The Photographs series include snapshots of Werner's children and grandchildren, snapshots of prisoners, and photographs of Werner accepting awards.

Two plaques comprise the Artifacts series: an award Werner received in 1981 from the state of Iowa in recognition of her work at the Iowa State Penitentiary and a 1988 award from a prisoner Alcoholics Anonymous group.

A book about Werner's paternal grandmother, Maria Brown, is shelved in the printed works collection of the Iowa Women's Archives:

Grandmother Brown's Hundred Years, 1827-1927 (1929) by Harriet Connor Brown. [CT275. B7657B7 1929]