| Document And Entity Information | Jan. 28, 2022 |
| Document Information [Line Items] | |
| Entity, Registrant Name | WVS Financial Corp |
| Document, Type | 8-K |
| Document, Period End Date | Jan. 28, 2022 |
| Entity, Incorporation, State or Country Code | PA |
| Entity, File Number | 0-22444 |
| Entity, Tax Identification Number | 25-1710500 |
| Entity, Address, Address Line One | 9001 Perry Highway |
| Entity, Address, City or Town | Pittsburgh |
| Entity, Address, State or Province | PA |
| Entity, Address, Postal Zip Code | 15237 |
| City Area Code | 412 |
| Local Phone Number | 364-1911 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | WVFC |
| Security Exchange Name | NASDAQ |
| Entity, Emerging Growth Company | false |
| Amendment Flag | false |
| Entity, Central Index Key | 0000910679 |
