Document and Entity Information - USD ($)	12 Months Ended
	Jun. 30, 2019	Sep. 10, 2019	Dec. 31, 2018
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, 2019
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 Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Public Float			$ 43,320,411
Entity Common stock, closing sale price			$ 24.92
Entity Common Stock, Shares Outstanding		2,401,213
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2019
Entity Shell Company	false
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Incorportion, State or Country Code	NY
Entity File Number	1-4383
Document Annual Report	true
Document Transition Report	false