Idaho State Highway 19
# Idaho State Highway 19

State Highway 19 (SH-19) is a state highway in Idaho from the Oregon state line to Interstate 84 (I-84) and U.S. Route 30 (US 30) in Caldwell. SH-19 is signed as an east–west highway.

## Route description

Its western terminus is at the Oregon state line; the highway continues west then north as Oregon 201. After passing through Homedale, it is concurrent with US 95 to Wilder. SH-19 then turns east, passing through Greenleaf before ending at I-84 in Caldwell.

## History

SH-19 was extended through downtown Caldwell to an interchange with I-84 in 2022 as part of a long-term relinquishment of I-84 Business to the city government.

## Major intersections

| County | Location | mi | km | Destinations | Notes |
| - | - | - | - | - | - |
| Owyhee | ​ | 0.000 | 0.000 | OR 201 | |
| Owyhee | Homedale | 4.82734.195 | 7.76855.032 | Main Street / Idaho Avenue | Old alignment of US 95 |
| Owyhee | Homedale | 34.572 | 55.638 | US 95 Conn. | |
| Owyhee | Homedale | 34.638 | 55.744 | US 95 south – Marsing, Jordan Valley | West end of US 95 overlap |
| Canyon | Wilder | 38.4299.070 | 61.84514.597 | US 95 north – Wilder, Payette | East end of US 95 overlap |
| Canyon | Caldwell | 19.830 | 31.913 | SH-19 Conn. to I-84 BL – Nampa | |
| Canyon | Caldwell | 19.915 | 32.050 | I-84 BL east – Nampa | West end of I-84 Bus. overlap |
| Canyon | Caldwell | 20.855 | 33.563 | I-84 / US 30 – Ontario, Nampa, Boise | East end of I-84 Bus. overlap |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||

## Connector route

State Highway 19 Connector is a short one-way route connecting SH-19 and I-84 Bus.

