Newton Aycliffe and Spennymoor is a constituency of the House of Commons in the UK Parliament.

[3] The seat was won by Alan Strickland MP of Labour, with a majority of 8,839 and a vote share of 46.2%.

The constituency is composed of the following electoral divisions of County Durham (as they existed on 1 December 2020): The seat is made up of the bulk of the abolished constituency of Sedgefield, expanded to include Spennymoor and Tudhoe from Bishop Auckland, and Coxhoe from City of Durham.

[5] The seat is the successor to Sedgefield, most famously represented by former Labour Prime Minister Tony Blair from 1983 to 2007; he led a successful campaign for his party to win the 1997 general election in a landslide and thereafter served for ten years as Prime Minister, resigning as the MP for Sedgefield on the same day as he resigned as prime minister.

In 2019, Sedgefield was gained by the Conservatives for the first time since 1935, a result which would have been replicated if the new seat of Newton Aycliffe and Spennymoor had existed then.