Document and Entity Information - shares	9 Months Ended
	Mar. 31, 2019	May 10, 2019
Document And Entity Information [Abstract]
Entity Registrant Name	ESPEY MFG & ELECTRONICS CORP
Entity Central Index Key	0000033533
Document Type	10-Q
Document Period End Date	Mar. 31, 2019
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
Document Fiscal Period Focus	Q3
Document Fiscal Year Focus	2019
Entity Common Stock, Shares Outstanding		2,400,713