Document and Entity Information
| Document and Entity Information | Feb. 01, 2021 |
| Document and Entity Information [Abstract] | |
| Document Type | 8-K/A |
| Document Period End Date | Feb. 1, 2021 |
| Entity File Number | 000-55983 |
| Entity Registrant Name | Meridian Corp |
| Entity Incorporation, State or Country Code | PA |
| Entity Tax Identification Number | 83-1561918 |
| Entity Address, Address Line One | 9 Old Lincoln Highway |
| Entity Address, City or Town | Malvern |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19355 |
| City Area Code | 484 |
| Local Phone Number | 568-5000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, $1 par value |
| Trading Symbol | MRBK |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
| Entity Central Index Key | 0001750735 |
| Amendment Flag | true |
| Amendment Description | This Amendment No.1 to the Current Report on Form 8-K is being filed solely to correct a typographical error in a date contained in Item 8.01 and Exhibit 99.1. |