Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2018	Sep. 04, 2018	Dec. 31, 2017
Document And Entity Information
Entity Registrant Name	ESPEY MFG & ELECTRONICS CORP
Entity Central Index Key	0000033533
Document Type	10-K
Document Period End Date	Jun. 30, 2018
Amendment Flag	false
Current Fiscal Year End Date	--06-30
Is Entity a Well-known Seasoned Issuer	No
Is Entity a Voluntary Filer	No
Is Entitys Reporting Status Current	Yes
Entity Filer Category	Smaller Reporting Company
Entity Public Float			$ 40,076,299
Entity Common stock, closing sale price			$ 23.96
Entity Common Stock, Shares Outstanding		2,388,224
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2018