Warmington is on the northern side of Edge Hill, a prominent local ridge. Its church is one of six that make up the Edgehill group, along with those of nearby Radway, Ratley and Shotteswell. The village is also regarded as being part of the informal area of Banburyshire.
The M40 motorway passes just to the north and east of Warmington. Before the motorway was built, the village lay on the A41 road.