| Trail City, South Dakota | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | South Dakota#USA |
| Pushpin Label: | Trail City |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location within the state of South Dakota |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | South Dakota |
| Subdivision Type2: | County |
| Subdivision Name2: | Corson |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Central (CST) |
| Utc Offset: | -6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | -5 |
| Elevation Ft: | 2142 |
| Coordinates: | 45.4725°N -100.7256°W |
| Postal Code Type: | ZIP codes |
| Postal Code: | 57657 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1258590 |
Trail City is an unincorporated community straddling Dewey County, South Dakota and Corson County, South Dakota, United States. Although not tracked by the Census Bureau, Trail City has been assigned the ZIP code of 57657.[1]
The community was originally named Cheyenne Junction upon establishment in 1911, a reference to its location at the junction of two branches of the railroad. Due to confusion in the mails with two other South Dakota post offices (Cheyenne Agency and Cheyenne Falls), alternate town names were considered. Among the candidate town names were Rodero, Prairie, and Trail City; the latter chosen in 1912 because of the many indigenous trails that crossed in the vicinity.
The community was named for a cattle drive trail near the original town site according to some secondary sources.[2]