Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2017	Sep. 12, 2017	Dec. 31, 2016
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, 2017
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			$ 43,624,179
Entity Common stock, closing sale price			$ 26.06
Entity Common Stock, Shares Outstanding		2,371,321
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2017