Part IV
| Bishop Auckland(County constituency) | (i) The following wards of the District of Sedgefield, namely, Byerley, Middridge, Neville, Shafto, Simpasture, Sunnydale, Thickley, West and Woodham; (ii) the District of Teesdale; and (iii) the following wards of the District of Wear Valley, namely, Bishop Auckland Town, Cockton Hill, Coundon, Coundon Grange, Escomb, Henknowle, St. Helen's, West Auckland and Woodhouse Close. |
| City of Durham(County constituency) | The City of Durham. |
| Easington(County constituency) | The following wards of the District of Easington, namely, Acre Rigg, Blackhalls, Dawdon, Dene House, Deneside, Easington Colliery, Easington Village, Eden Hill, Haswell, High Colliery, Horden North, Horden South, Howletch, Murton East, Murton West, Park, Passfield, Seaham, Shotton, South and South Hetton. |
| North Durham(County constituency) | (i) The District of Chester-le-Street; and (ii) the following wards of the District of Derwentside, namely, Annfield Plain, Burnopfield, Catchgate, Craghead, Dipton, Havannah, South Moor, South Stanley, Stanley Hall and Tanfield. |
| Sedgefield(County constituency) | (i) The following wards of the Borough of Darlington, namely, Heighington, Hurworth, Middleton St. George, Sadberge and Whessoe; (ii) the following wards of the District of Easington, namely, Deaf Hill, Hutton Henry, Thornley, Wheatley Hill and Wingate; and (iii) the following wards of the District of Sedgefield, namely, Bishop Middleham, Broom, Chilton, Cornforth, Ferryhill, Fishburn, Low Spennymoor and Tudhoe Grange, Middlestone, New Trimdon and Trimdon Grange, Old Trimdon, Sedgefield, Spennymoor and Tudhoe. |