Underhill is a Unincorporated area located in Northumberland, New Brunswick and has an elevation of 35 meters.

• Latitude: 46° 45' 17'' North   (decimal: 46.7547568)
• Longitude: 65° 49' 6'' West   (decimal: -65.8182202)
• Topography Feature Category: Unincorporated area
• Geographical Feature: Dispersed Rural Community
• Canadian Province/Territory: New Brunswick
• Elevation: 35 meters
• Location: Northumberland
• Atlas of Canada Locator Map: Underhill
• GPS Coordinate Locator Map: Underhill Lat/Long