| Official Name: | Arba, Indiana |
| Pushpin Map: | Indiana#USA |
| Pushpin Label: | Arba |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Indiana |
| Subdivision Type2: | County |
| Subdivision Name2: | Randolph |
| Subdivision Type3: | Township |
| Subdivision Name3: | Greensfork |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 40.0108°N -84.8669°W |
| Elevation Ft: | 1184 |
| Postal Code Type: | ZIP code |
| Postal Code: | 47355 |
| Area Code: | 765 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 430231 |
Arba is an unincorporated community in Greensfork Township, Randolph County, in the U.S. state of Indiana.
Arba was settled by Quakers as early as 1815.[1] A post office was established at Arba in 1849, and remained in operation until it was discontinued in 1911.[2]