The Maria E. Rundquist papers date from 1959 to 2016 and measure 7.5 linear inches. The papers are arranged in four series: Biographical, Political Involvement, Midwest Gas, and Photographs.

The Biographical series includes Rundquist's birth and divorce records in both Spanish and English. The newspaper clippings cover Rundquist's campaigns for various offices, her resignation from the Iowa Commission on Latino Affairs, and her volunteer and political activities. The correspondence folder contains letters from school children that Rundquist received while she was on the Commission on Latino Affairs and supportive notes from friends about her campaigns for office. The resume folder includes brochures for Rundquist's consulting firm. This series also includes an oral history conducted by Kären Mason, curator of the Iowa Women's Archives, in 2004. The memoir "Maria: Immigrant, Community Activist" (2016) is also included.

The Political Involvement series includes email correspondence between Rundquist and members of Senator Charles Grassley's staff after Grassley named Rundquist to be an adviser to Senate Republicans on Hispanic affairs. It also contains campaign literature, notes from speeches, press releases, and endorsement letters from Rundquist's campaigns for elective office. The file on the Commission on Latino Affairs contains Rundquist's oath of office, an outline of the Commission's intended scope and purpose, and meeting minutes.

The Midwest Gas series contains material concerning Rundquist's employment with the company as a customer service representative and liaison with Latino customers. The series also includes material related to her civil rights complaint against the company, including a copy of the original complaint; correspondence between Rundquist, her attorney, and Midwest Gas; and a report issued by Midwest Gas after an internal investigation.

The Photographs series contains family photos of Maria Rundquist from her childhood days in Mexico through adulthood. A few photos depict her participation in political activities, including a photo of Rundquist with Vice President Al Gore and one with George W. Bush during his 2000 presidential campaign.