The main features within the parish are the Humber shoreline, running roughly NW-SE, the Immingham Dock and estate, and adjacent south of the dock the town of Immingham.The A180 and Stallingborough-Habrough section of the mainline railway west out of Grimsby (Great Grimsby and Sheffield Junction Railway) pass roughly east–west through the southern part of the parish. Excluding farms there are no other places of habitation outside the town in the civil parish.
There are two abandoned sites of medieval villages in the parish: that of the village of Immingham, northwest of the modern town, near St Andrew's Church; and Roxton in the southern extremity of the parish.
The town has a retail centre, "Kennedy Way", a swimming pool and a golf club, and several schools.
The parish extends to the southwest as far as Roxton, with boundaries to the southwest and south with the civil parishes of Habrough and Keelby.
The civil parish is low lying, extending from below 5 metres (16 ft) above sea level near the Humber foreshore, to a peak of 21 metres (69 ft) in Roxton wood in the southwest corner.
The Immingham Ward of North East Lincolnshire Council includes Stallingborough, Healing and Habrough.
As of 2015 its elected councillors are Mike Burton (Labour), David Bolton (Labour), and David Watson (Labour).
On the northeastern outskirts of the town there is a Knauf UK Gmb H plant that makes plasterboard.
The name Immingham is thought to mean the "Homestead of the people of Imma"; Saint Andrew's church dates to the early medieval period, with much of the structure dating to the 13th century, with parts of the nave as early as the 11th or 12th century.
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