| Rains Brook | |
| Pushpin Map: | Warwickshire |
| Pushpin Map Caption: | Location of the mouth within Warwickshire |
| Subdivision Type1: | Country |
| Subdivision Name1: | England |
| Subdivision Type2: | Counties |
| Subdivision Name2: | Northamptonshire, Warwickshire |
| Length: | 11.8km (07.3miles) |
| Source1 Location: | Kilsby |
| Mouth Location: | Leam |
| Mouth Coordinates: | 52.3135°N -1.2859°W |
Rains Brook is a 11.8adj=midNaNadj=mid tributary of the River Leam.[1]
Formed by a series of small headwater streams midway between Barby and Kilsby in Northamptonshire, it then flows west in a valley south of Rugby on the border between Northamptonshire and Warwickshire. It then runs south-west to where it joins the River Leam, between Kites Hardwick and Woolscott.[1]