| County : | Yellowstone County |
| State : | Montana (MT) |
| Land Area : | 2,633.28 sq mi |
| Water Area : | 15.74 sq mi |
| Latitude : | 45.9369867 |
| Longitude : | -108.2766564 |
| Population (2010): | 147,972 |
| Population Estimate (2012) : | 148,191 |
| Population Density : | 56.19/sq mi |
| Housing Units (2012) : | 63,943 |
| Median Household Income (2012) : | $50,608 (Montana : $45,456, USA : $53,046) |
| Median Family Income (2012) : | $64,858 (Montana : $58,951, USA : $64,585) |
| Median House Price (2012) : | $178,100 (Montana : $183,000, USA : $181,400) |
Yellowstone County Cities / Towns
| Ballantine (320) | Billings City (104,170) | Broadview Town (192) |
| Custer (159) | Huntley (446) | Laurel City (6,718) |
| Lockwood (6,797) | Shepherd (516) | Worden (577) |
Yellowstone County Zip Codes
| 59002 (165) | 59006 (926) | 59015 (576) |
| 59024 (390) | 59037 (1,672) | 59041 (1,950) |
| 59044 (10,971) | 59057 (692) | 59064 (284) |
| 59079 (3,481) | 59088 (1,373) | 59101 (39,562) |
| 59102 (46,564) | 59105 (29,624) | 59106 (12,375) |