| Country: | IRL |
| Type: | R |
| Route: | 158 |
| Image Notes: | Realignment works on the R158 between Summerhill and Kilcock in October 2007 |
| Length Km: | 22 |
| Destinations: |
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The R158 road is a regional road in Ireland, linking Trim in County Meath to Kilcock in County Kildare. The road, which is single-carriageway throughout, has been extensively realigned in recent years at a cost of €22m, the section between Kilcock and Summerhill having been completed by Fallon Construction in August 2008.
The road runs in a south-southeasterly direction from a junction with the R161 in Trim by way of Summerhill to a junction with the R148 in Kilcock.