The H.A. Reinhold papers includes correspondences in German and English, as well as manuscripts of books, articles, sermons, and radio broadcasts. The collection also includes personal documents, publications, financial records, audio material, photographs, artwork, and various personal artifacts.

Series I. Correspondence: "Correspondence" consists of four subseries: Early German, German Sea Apostolate, Post-Expulsion, and Family. All letters, postcards, and telegrams were received or sent by Reinhold between 1918 and 1967. "Early German" contains miscellaneous letters and telegrams dated from 1916 to 1929. "German Sea Apostolate" includes correspondences from the time when Reinhold headed the Seaman's Apostolate out of Bremerhaven and Hamburg. "Post-Expulsion" consists of various letters and postcards, including many dealing with German World War II refugees and Reinhold's work with the Liturgical Week. Papers in the "Family" subseries were received by Reinhold from and about various family members. Each subseries is arranged alphabetically, with the exception of the subseries "German Sea Apostolate," which is arranged chronologically.

Series II. Manuscripts: "Manuscripts" consists of five subseries: Books, Articles and Book Introductions, Book Reviews, Notes, and Addresses/Sermons/Radio Broadcasts. "Articles and Book Introductions" contains two sub-subseries: "Articles" and "Serial Articles," and includes works from Reinhold's "Timely Tracts" in Orate Fratres. Many manuscripts in "Books" and "Book Reviews" address the liturgy. "Notes" includes outlines of articles and miscellaneous fragments. Of note in "Addresses, Sermons, and Radio Broadcasts" are the handwritten manuscripts of Reinhold's sermons in Niendorf. The series' dated manuscripts were created by Reinhold between 1929 and 1966; many are not dated. Some articles are in English and others are in German. Each subseries and sub-subseries is arranged alphabetically.

Series III. Publications: "Publications" consists of two subseries: Articles and Reviews, and Publications by others about H.A.R. "Articles and Reviews" are publications by H.A.R. and include works in English, German, and French, with many having the liturgy as the subject. The subseries "Publications by others about H.A.R." consists of reviews of Reinhold's books, articles commenting on his life and death, and articles in which he was mentioned. The dated publications range from 1931 to 1997; several are not dated. Each subseries is arranged alphabetically.

Series IV. Personal Documents: "Personal Documents" consists of identity and citizenship certificates, church papers, German documents, Reinhold's last will and testament, university and school papers, awards and honors, and other personal documents. The Duquesne University citation and degree are oversized. The series is arranged alphabetically.

Series V. Financial Records: "Financial Records" contains documents relating to Reinhold's finances. Of note are the donation records related to Reinhold's post-WWII work sending care packages to Germany. The series is arranged alphabetically.

Series VI. Photographs: "Photographs" consists of three subseries: Photographs of H.A.R., Photographs of Other People and Places, and Albums. The series includes framed portraits, negatives, family photographs, World War I photographs, and photographs of friends such as W.H. Auden. Dated materials are between 1914 and 1960; many are not dated. Each subseries is arranged alphabetically.

Series VII. Scrapbooks: "Scrapbooks" contains books that include articles and clippings dated between 1957 and 1966, and postcards dated between 1914 and 1931. The series is arranged alphabetically.

Series VIII. Artwork and Artifacts: "Artwork and Artifacts" consists of two subseries: Artwork and Artifacts. The series consists of artwork created for Reinhold and items such as medallions, a rosary, and liturgical vestments and artifacts. Each subseries is arranged alphabetically.