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Document and Entity Information
12 Months Ended
Jun. 30, 2025
Document Information [Line Items]  
Document Type 11-K
Entity Registrant Name Southern Missouri Bancorp, Inc.
Entity Central Index Key 0000916907
Amendment Flag false
Southern Bank 401(k) Retirement Plan (the Plan)  
Document Information [Line Items]  
Document Type 11-K
Amendment Flag false