| Document and Entity Information | Jan. 21, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Jan. 21, 2021 |
| Entity Registrant Name | OLD POINT FINANCIAL CORP |
| Entity Incorporation, State or Country Code | VA |
| Entity File Number | 000-12896 |
| Entity Tax Identification Number | 54-1265373 |
| Entity Address, Address Line One | 1 WEST MELLEN ST |
| Entity Address, City or Town | HAMPTON |
| Entity Address, State or Province | VA |
| Entity Address, Postal Zip Code | 23663 |
| City Area Code | 757 |
| Local Phone Number | 728-1876 |
| 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 | 0000740971 |
| Title of 12(b) Security | Common Stock, $5.00 par value |
| Trading Symbol | OPOF |
| Security Exchange Name | NASDAQ |
