- CYCS 224/01 Folder : Africa
- CYCS 224/02 Folder : Arizona
- CYCS 224/03 Folder : Asia
- CYCS 224/04 Folder : Bahamas
- CYCS 224/05 Folder : California
- CYCS 224/06 Folder : Canada
- CYCS 224/07 Folder : Colorado
- CYCS 224/08 Folder : Connecticut
- CYCS 224/09 Folder : Florida
- CYCS 224/10 Folder : Georgia
- CYCS 224/11 Folder : Illinois
- CYCS 224/12 Folder : Kentucky
- CYCS 224/13 Folder : Maryland
- CYCS 224/14 Folder : Massachusetts
- CYCS 224/15 Folder : Michigan
- CYCS 224/16 Folder : Nebraska
- CYCS 224/17 Folder : New Hampshire
- CYCS 224/18 Folder : New Jersey
- CYCS 224/19 Folder : New York, Spanish Federation - YCS
- CYCS 224/20 Folder : New York
- CYCS 224/21 Folder : Ohio
- CYCS 224/22 Folder : Pennsylvania
- CYCS 224/23 Folder : Puerto Rico
- CYCS 224/24 Folder : Rhode Island
- CYCS 224/25 Folder : Texas
- CYCS 224/26 Folder : Vermont
- CYCS 224/27 Folder : Washington
- CYCS 224/28 Folder : Washington, DC
- CYCS 224/29 Folder : Wisconsin
- CYCS 237/01 Folder : Correspondence - New Orleans Area 1961/01
- CYCS 237/02 Folder : Correspondence - Secular Schools - Newman 1961/01-03
- CYCS 237/03 Folder : Correspondence - Secular Schools - Newman 1961/04-06
- CYCS 237/04 Folder : Correspondence - Secular Schools - Newman 1961/07-09
- CYCS 237/05 Folder : Correspondence - Secular Schools 1961/10-12
- CYCS 237/06 Folder : Correspondence - Secular Schools 1962/01-03
- CYCS 237/07 Folder : Correspondence - Secular Schools 1962/04-06
- CYCS 237/08 Folder : Newman Correspondence 1953-1957
- CYCS 237/09 Folder : National Newman Club Federation - College YCS
- CYCS 237/10 Folder : National Newman Club Federation - Communications 1950-1960
- CYCS 237/11 Folder : Newman Study Week 1963
- CYCS 239/12 Folder : Area Correspondence and Contact
- CYCS 240/05 Folder : Correspondence and Notes
- CYCS 240/14 Folder : Correspondence
- CYCS 240/15 Folder : Correspondence
- CYCS 241/49 Folder : Regional Correspondence
- CYCS 241/50 Folder : Correspondence 1966
- CYCS 241/63 Folder : Letters
- CYCS 255/07 Folder : Correspondence
- CYCS 255/18 Folder : Correspondence - Rev. James Halpine
- CYCS 255/24 Folder : Correspondence
- CYCS 270/12 Folder : Chicago YCS Correspondence
- CYCS 271/04 Folder : YCS Completed Correspondence 1978-1982
- CYCS 271/11 Folder : Correspondence
- CYCS 271/12 Folder : Finished Correspondence 1975-1976
- CYCS 271/27 Folder : Correspondence
- CYCS II Series : Section Files
Correspondence and reports from section leaders, filed by state and by area within the state. See also correspondence series above.
- CYCS 16/01 Folder : Kits
- CYCS 16/02 Folder : Names for Mailing Lists
- CYCS 16/03 Folder : Miscellaneous Lists of Names
- CYCS 16/04 Folder : Miscellaneous
- CYCS 16/05 Folder : Parish Based Program - Spring 1956
- CYCS 16/06 Folder : Questionnaire and Surveys 1950
- CYCS 16/07 Folder : Economic Questionnaire
- CYCS 16/08 Folder : Trips - Plans - Reports
- CYCS 16/09 Folder : Sisters Study Week, Seminarian Study Week
- CYCS 16/10 Folder : Social Life
- CYCS 16/11 Folder : Speeches
- CYCS 16/12 Folder : Student's Group - Boston, Massachusetts
- CYCS 16/13 Folder : Student's Group Section (A) - Springfield, Illinois
- CYCS 16/14 Folder : Student's Group Section (A) - Toledo, Ohio
- CYCS 16/15 Folder : The Cells 1940-1941
- CYCS 16/16 Folder : The Cells - Toledo, Ohio 1941-1943
- CYCS 16/17 Folder : Catholic Action Bulletin - Dayton, Ohio 1945-1946
- CYCS 16/18 Folder : Catholic Action Bulletin - Dayton, Ohio 1942-1947
- CYCS 16/19 Folder : Student Group - Cincinnati, Ohio Section (A)
- CYCS 16/20 Folder : Student's Group - East St. Louis, Illinois (Belleville) Section (A) 1942
- CYCS 16/21 Folder : Student Group - Diocese of Providence, RI 1943-1946
- CYCS 16/22 Folder : Student's Group - Rochester, New York Section (A) 1946-1947
- CYCS 16/23 Folder : Student's Group - Chicago, Illinois 1943-1947
- CYCS 16/24 Folder : Student's Group (College) - Chicago, Illinois Section (C) 1942-1946
- CYCS 111/01 Folder : Canada
- CYCS 111/02 Folder : St. Michaels - Canada
- CYCS 111/03 Folder : Edmonton General Hospital - Alberta
- CYCS 111/04 Folder : Nebraska
- CYCS 111/05 Folder : St. Mary - Nebraska
- CYCS 111/06 Folder : Nevada
- CYCS 111/07 Folder : New Hampshire
- CYCS 111/08 Folder : St. Anselm's Abbey - Manchester, New Hampshire
- CYCS 111/09 Folder : New Jersey
- CYCS 111/10 Folder : New Mexico
- CYCS 111/11 Folder : New York
- CYCS 111/12 Folder : Georgian Court College 1963-1964
- CYCS 111/13 Folder : New York Area
- CYCS 111/14 Folder : New York
- CYCS 111/15 Folder : St. Bonaventure - New York
- CYCS 111/16 Folder : St. Finbar's Parish
- CYCS 111/17 Folder : Potsdam State Teachers College
- CYCS 111/18 Folder : St. Francis - New York
- CYCS 111/19 Folder : St. Joseph's - Brooklyn
