Bricquebec-en-Cotentin (, literally Bricquebec in Cotentin) is a commune in the department of Manche, northwestern France. The municipality was established on 1 January 2016 by merger of the former communes of Bricquebec (the seat), Les Perques, Quettetot, Saint-Martin-le-Hébert, Le Valdécie and Le Vrétot.
Bricquebec-en-Cotentin has an oceanic climate (Köppen climate classification Cfb). The average annual temperature in Bricquebec-en-Cotentin is . The average annual rainfall is with December as the wettest month. The temperatures are highest on average in August, at around , and lowest in February, at around . The highest temperature ever recorded in Bricquebec-en-Cotentin was on 2 August 1990; the coldest temperature ever recorded was on 17 January 1985.
The population data given in the table below refer to the commune in its geography as of January 2025.