Document and Entity Information - shares	9 Months Ended
	Jun. 30, 2016	Aug. 01, 2016
Document and Entity Information [Abstract]
Entity Registrant Name	MONMOUTH REAL ESTATE INVESTMENT CORP
Entity Central Index Key	0000067625
Document Type	10-Q
Document Period End Date	Jun. 30, 2016
Amendment Flag	false
Current Fiscal Year End Date	--09-30
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		67,706,651
Trading Symbol	MNR
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2016