| Document and Entity Information | Mar. 08, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Mar. 8, 2022 |
| Entity Registrant Name | YORK WATER CO |
| Entity Incorporation, State or Country Code | PA |
| Entity File Number | 001-34245 |
| Entity Tax Identification Number | 23-1242500 |
| Entity Address, Address Line One | 130 East Market Street |
| Entity Address, City or Town | York |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 17401 |
| City Area Code | 717 |
| Local Phone Number | 845-3601 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000108985 |
| Title of 12(b) Security | COMMON STOCK, NO PAR VALUE |
| Trading Symbol | YORW |
| Security Exchange Name | NASDAQ |
