Maesgeirchen is a large housing estate on the edge of the city of Bangor in Gwynedd, north-west Wales, with roughly 4,000 inhabitants.

It has a community centre (Ty Cegin, built with National Lottery funding as a Healthy Living Centre and later taken over by the local Communities First Partnership following cessation of five years of lottery funding), It used to have a social club, which closed in 2014, although plans were made to demolish it and replace it with a Costcutter convenience store in 2020.

[1] It was originally constructed in the late 1930s, with more homes being added after World War II and in recent years.

In 2002 the estate was fitted with CCTV, which covers most streets, In 2003, the local council-owned pre-war homes on the estate underwent an expansive home-improvement scheme funded by the council, which saw them all fitted with double-glazing and central heating, as well as maintenance and modernisation work to both the interior and exterior of the buildings.

There are also numerous un-made footpaths leading to and from the estate; one called Lôn Felin Esgob (meaning "Bishop's mill lane") is an old highway with some of the paving still in place.