| Cover Page Cover Page | Oct. 29, 2019 |
| Cover Page [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Oct. 29, 2019 |
| Entity Registrant Name | Key Tronic Corp |
| Entity Incorporation, State or Country Code | WA |
| Entity File Number | 0-11559 |
| Entity Tax Identification Number | 91-0849125 |
| Entity Address, Address Line One | 4424 North Sullivan Road |
| Entity Address, City or Town | Spokane Valley, |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 99216 |
| City Area Code | 509 |
| Local Phone Number | 928-8000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Amendment Flag | false |
| Entity Central Index Key | 0000719733 |
