Core-Based Statistical Area (CBSA):
Janesville-Beloit, WI is a Core-Based Statistical Area (CBSA) comprising counties including Rock County.
| Name | State | Population | 
|---|---|---|
| Janesville | Wisconsin | 72,636 | 
| Beloit | Wisconsin | 49,256 | 
| Edgerton | Wisconsin | 12,040 | 
| Milton | Wisconsin | 11,349 | 
| Evansville | Wisconsin | 8,713 | 
| Clinton | Wisconsin | 4,032 | 
| Orfordville | Wisconsin | 2,300 | 
| Footville | Wisconsin | 843 | 
| Avalon | Wisconsin | 357 | 
| Afton | Wisconsin | 191 | 
| Zipcode | Population | Density | Timezone | Latitude | Longitude | City | County | State | 
|---|---|---|---|---|---|---|---|---|
| 53501 | 191 | 1,131 | America/Chicago | 42.60606 | -89.06536 | Afton | Rock County | Wisconsin | 
| 53505 | 357 | 7.5 | America/Chicago | 42.65691 | -88.81901 | Avalon | Rock County | Wisconsin | 
| 53537 | 843 | 368.6 | America/Chicago | 42.67244 | -89.21045 | Footville | Rock County | Wisconsin | 
| 53576 | 2,300 | 28.4 | America/Chicago | 42.62423 | -89.23481 | Orfordville | Rock County | Wisconsin | 
| 53525 | 4,032 | 27.9 | America/Chicago | 42.54801 | -88.85533 | Clinton | Rock County | Wisconsin | 
| 53536 | 8,713 | 35.6 | America/Chicago | 42.76193 | -89.26543 | Evansville | Rock County | Wisconsin | 
| 53563 | 11,349 | 67.8 | America/Chicago | 42.79170 | -88.93357 | Milton | Rock County | Wisconsin | 
| 53534 | 12,040 | 57.2 | America/Chicago | 42.84999 | -89.08750 | Edgerton | Rock County | Wisconsin | 
| 53548 | 19,243 | 104 | America/Chicago | 42.68536 | -89.12871 | Janesville | Rock County | Wisconsin | 
| 53545 | 23,208 | 361.9 | America/Chicago | 42.73551 | -89.04054 | Janesville | Rock County | Wisconsin |