| Cover | Apr. 23, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | EXPLANATORY NOTE: The Annual Meeting of Shareholders of Muncy Columbia Financial Corporation (the “Corporation”) was held on April 23, 2024. On that date, the Corporation filed a Form 8-K to report the results of shareholder voting at the Annual Meeting. This Form 8-K/A is being filed to report the action taken by the Corporation’s Board of Directors at the Board’s regular meeting on May 14, 2024, with regard to the frequency of shareholder non-binding advisory votes on executive compensation (the “Say On Frequency” vote). |
| Document Period End Date | Apr. 23, 2024 |
| Entity File Number | 000-19028 |
| Entity Registrant Name | MUNCY COLUMBIA FINANCIAL CORPORATION |
| Entity Central Index Key | 0000731122 |
| Entity Tax Identification Number | 23-2254643 |
| Entity Incorporation, State or Country Code | PA |
| Entity Address, Address Line One | 232 East Street |
| Entity Address, City or Town | Bloomsburg |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 17815 |
| City Area Code | 570 |
| Local Phone Number | 784-4400 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | None |
| Trading Symbol | None |
| Entity Emerging Growth Company | false |
