| Document And Entity Information | Jan. 25, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 25, 2023 |
| Entity Registrant Name | EAGLE FINANCIAL SERVICES, INC. |
| Entity Central Index Key | 0000880641 |
| Entity Emerging Growth Company | false |
| Securities Act File Number | 0-20146 |
| Entity Incorporation, State or Country Code | VA |
| Entity Tax Identification Number | 54-1601306 |
| Entity Address, Address Line One | 2 East Main Street |
| Entity Address, City or Town | Berryville |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 22611 |
| City Area Code | (540) |
| Local Phone Number | 955-2510 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | None |
| No Trading Symbol Flag | true |
| Security Exchange Name | NONE |
