RUCA Version 1.1
RUCA Code Definitions
1. Urban core Census tract
[primary flow within Census Bureau defined Urbanized Area (metro>= 50,000)]
1.1 secondary flow (30-50%) to larger urbanized area
1.0 otherwise
2. Census tract strongly tied to urban core
[primary flow to Census Bureau defined Urbanized Area (>30%)]
2.1 secondary flow (30-50%) to larger urbanized area)
2.2 combined flows to urbanized areas of >30% and greater than primary flow
2.0 otherwise
3. Census tract weakly tied to urban core
[primary flow to Census Bureau defined Urbanized Area but 5-30%]
3.0 --
4. Large town Census tract
[primary flow within large Census Bureau defined Urban Place (10,000-49,999 & >30%)]
4.1 secondary flow (30-50%) to urbanized area
4.0 otherwise
5. Census tract strongly tied to large town
[primary flow to large Census Bureau defined Urban Place (>30%)]
5.1 secondary flow (30-50%) to urbanized area
5.0 otherwise
6. Census tract weakly tied to large town
[primary flow to large Census Bureau defined Urban Place (5-30%)]
6.0 --
7. Small town Census tract
[primary flow within small Census Bureau defined Urban Place (>= 2,500 & <10,000 & >30%)]
7.1 secondary flow (30-50%) to urbanized area
7.2 secondary flow (30-50%) to large urban place
7.3 secondary flow (5-30%) to urbanized area
7.4 secondary flow (5-30%) to large urban place
7.0 otherwise
8. Census tract strongly tied to small town
[primary flow to a small Census Bureau defined Urban Place (>30%)]
8.1 secondary flow (30-50%) to urbanized area
8.2 secondary flow (30-50%) to large urban place
8.3 secondary flow (5-30%) to urbanized area
8.4 secondary flow (5-30%) to large urban place
8.0 otherwise
9. Census tract weakly tied to small town
[primary flow to a small Census Bureau defined Urban Place (5-30%)]
9.1 secondary flow (5-30%) to urbanized area
9.2 secondary flow (5-30%) to large urban place
9.0 otherwise
10. Isolated small rural Census tract (remaining rural tracts)
[no primary flows over 5% to any Census Bureau defined Urbanized Area (metro), large Urban Place, or small Urban Place]
10.1 secondary flow (30-50%) to urbanized area
10.2 secondary flow (30-50%) to large urban place
10.3 secondary flow (30-50%) to small urban place
10.4 secondary flow (5-30%) to urbanized area
10.5 secondary flow (5-30%) to large urban place
10.0 otherwise