This table ranks all 21 ZIP codes in the Marietta, OH MSA by estimated 2022 population, from highest to lowest.
| # | ZIP Code | Place Name | Population (2022) |
|---|---|---|---|
| 1 | ZIP 45750 | Marietta | 26,250 |
| 2 | ZIP 45714 | Belpre | 9,167 |
| 3 | ZIP 45723 | Coolville | 3,650 |
| 4 | ZIP 45742 | Little Hocking | 3,335 |
| 5 | ZIP 45784 | Vincent | 3,250 |
| 6 | ZIP 43787 | Stockport | 3,024 |
| 7 | ZIP 45786 | Waterford | 2,854 |
| 8 | ZIP 45767 | New Matamoras | 2,598 |
| 9 | ZIP 45744 | Lowell | 2,234 |
| 10 | ZIP 45715 | Beverly | 2,197 |
| 11 | ZIP 45724 | Cutler | 2,190 |
| 12 | ZIP 45729 | Fleming | 2,111 |
| 13 | ZIP 45768 | Newport | 1,567 |
| 14 | ZIP 45745 | Lower Salem | 1,049 |
| 15 | ZIP 45788 | Whipple | 975 |
| 16 | ZIP 45711 | Amesville | 937 |
| 17 | ZIP 45773 | Reno | 533 |
| 18 | ZIP 45746 | Macksburg | 373 |
| 19 | ZIP 45734 | Graysville | 325 |
| 20 | ZIP 45789 | Wingett Run | 146 |
| 21 | ZIP 45721 | Coal Run | 23 |