- October 1, 1975 (The first time that Spike's thoughts are shown in a thought balloon)
- October 2, 1975 (Peanuts' 25th anniversary)
- October 3, 1975
- October 4, 1975 (This strip is adapted in I Want a Dog for Christmas, Charlie Brown)
- October 5, 1975
- October 6, 1975
- October 7, 1975 (Andy foreshadowing)
- October 8, 1975
- October 9, 1975
- October 10, 1975
- October 11, 1975
- October 12, 1975
- October 13, 1975
- October 14, 1975
- October 15, 1975
- October 16, 1975
- October 17, 1975
- October 18, 1975
- October 19, 1975 (Football gag for 1975. The top tier shrinks to the same height as the lower tiers)
- October 20, 1975
- October 21, 1975
- October 22, 1975
- October 23, 1975 (Beginning of a storyline that was later adapted in the book Happy Halloween, Great Pumpkin!)
- October 24, 1975
- October 25, 1975
- October 26, 1975
- October 27, 1975
- October 28, 1975 (The day that You're a Good Sport, Charlie Brown first aired)
- October 29, 1975
- October 30, 1975
- October 31, 1975
| ← September 1975 | November 1975 → |