| Saint Mary, Nebraska | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | USA Nebraska |
| Pushpin Label: | Saint Mary |
| Pushpin Label Position: | top |
| Pushpin Map Caption: | Location within the state of Nebraska |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Nebraska |
| Subdivision Type2: | County |
| Subdivision Name2: | Johnson |
| Unit Pref: | Imperial |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 1155 |
| Coordinates: | 40.4242°N -96.29°W |
| Postal Code Type: | ZIP code |
| Postal Code: | 68443 |
| Blank Name: | FIPS code |
| Blank Info: | 31-43195 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 832971 |
Saint Mary is an unincorporated community in Johnson County, Nebraska, United States.
Saint Mary was originally called Smartville, but it was later renamed after the Saint Mary's Parochial School.[1]