- June 1, 1989
- June 2, 1989
- June 3, 1989
- June 4, 1989
- June 5, 1989
- June 6, 1989 (Beginning of a storyline that was later adapted in He's a Bully, Charlie Brown)
- June 7, 1989
- June 8, 1989
- June 9, 1989
- June 10, 1989
- June 11, 1989 (a very rare strip in which Marcie's eyes are visible through her glasses)
- June 12, 1989
- June 13, 1989 (Charlie Brown is revealed to have some feelings for Marcie)
- June 14, 1989
- June 15, 1989
- June 16, 1989
- June 17, 1989
- June 18, 1989 (Snoopy's father appears)
- June 19, 1989
- June 20, 1989
- June 21, 1989
- June 22, 1989
- June 23, 1989
- June 24, 1989 (Ending of a storyline adapted in He's a Bully, Charlie Brown)
- June 25, 1989
- June 26, 1989
- June 27, 1989
- June 28, 1989
- June 29, 1989 (This strip and the following strip are used on the pages for April 12 and July 29 of the Dayspring Peanuts A Year's Worth of Smiles and Blessings Desk Calendar)
- June 30, 1989 (This strip ends the only month of Peanuts without Lucy and Linus appearing, and only of the very few without Lucy after her introduction in March 1952)
← May 1989 | July 1989→ |