Pentney is a village and civil parish in the English county of Norfolk, located about 8 miles (13 km) south east of King's Lynn, placing it about halfway between King's Lynn and Swaffham on the A47 road. It covers an area of 10.39 km2 (4.01 sq mi) and had a population of 387 in 184 households at the 2001 census, increasing to 544 at the 2011 Census. For the purposes of local government, it falls within the district of King's Lynn and West Norfolk. It is in the valley of the River Nar, a tributary of the River Great Ouse.