Document And Entity Information - shares	9 Months Ended
	Jun. 30, 2023	Aug. 01, 2023
Document Information Line Items
Entity Registrant Name	Magyar Bancorp, Inc.
Trading Symbol	MGYR
Document Type	10-Q
Current Fiscal Year End Date	--09-30
Entity Common Stock, Shares Outstanding		6,662,098
Amendment Flag	false
Entity Central Index Key	0001337068
Entity Current Reporting Status	Yes
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Jun. 30, 2023
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q3
Entity Small Business	true
Entity Emerging Growth Company	false
Entity Shell Company	false
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	000-51726
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-4154978
Entity Address, Address Line One	400 Somerset Street
Entity Address, City or Town	New Brunswick
Entity Address, State or Province	NJ
Entity Address, Postal Zip Code	08901
City Area Code	(732)
Local Phone Number	342-7600
Title of 12(b) Security	Common Stock, $.01 per share
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes