| Cover | Dec. 31, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Dec. 31, 2021 |
| Entity File Number | 001-04383 |
| Entity Registrant Name | ESPEY MFG & ELECTRONICS CORP. |
| Entity Central Index Key | 0000033533 |
| Entity Tax Identification Number | 14-1387171 |
| Entity Incorporation, State or Country Code | NY |
| Entity Address, Address Line One | 233 Ballston Avenue |
| Entity Address, City or Town | Saratoga Springs |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 12866 |
| City Area Code | (518) |
| Local Phone Number | 584-4100 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock $.33-1/3 par value |
| Trading Symbol | ESP |
| Security Exchange Name | NYSEAMER |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | Not Applicable |
