| Urban definition |
| 1 |
Census tract is situated at the metropolitan area's core and the primary commuting flow is within an urbanized area of 50,000 residents or more |
| 2 |
Census tract is within a metropolitan area and has higher primary commuting (30% or more) to an urbanized area of 50,000 residents or more |
| 3 |
Census tract is within a metropolitan area and has lower primary commuting (10-30%) to an urbanized area of 50,000 residents or more |
| Large town definition |
| 4 |
Census tract is situated at a micropolitan area's core and the primary commuting flow is within a larger urban cluster of 10,000 to 49,999 residents |
| 5 |
Census tract is within a micropolitan area and has higher primary commuting (30% or more) to a larger urban cluster of 10,000 to 49,999 residents |
| 6 |
Census tract is within a micropolitan area and has lower primary commuting (10-30%) to a larger urban cluster of 10,000 to 49,999 residents |
| Small town definition |
| 7 |
Census tract has a primary commuting flow within a small urban cluster of 2,500 to 9,999 residents |
| 8 |
Census tract has higher primary commuting (30% or more) to a small urban cluster of 2,500 to 9,999 residents |
| 9 |
Census tract has lower primary commuting (10-30%) to a small urban cluster of 2,500 to 9,999 residents |
| Rural definition |
| 10 |
Census tract has a primary commuting flow outside of urban areas and urban clusters. |