Tillingham is a village and civil parish on the Dengie Peninsula in the Maldon District of Essex, England. It is located 8 miles (13 km) from Burnham-on-Crouch and 3 miles (4.8 km) south-west of Bradwell-on-Sea. At the 2021 census the parish had a population of 1,125.

The village has strong links with St Paul's Cathedral in London. The Corporation of the Cathedral Church of St Paul owns three arable farms, domestic properties and a significant amount of surrounding land.

Tillingham village is clustered around the main street with a historic centre that has been designated as a conservation area.

The conservation area in Tillingham was designated on 15 July 1969, since which there have been no revisions to the boundaries. It covers the historic settlement, which at the time of designation comprised the majority of the village.

The conservation area centres on the parish church of St. Nicholas and The Square stretching along the linear pattern of North Street and South Street. Short lengths of side roads off The Square and North and South Streets are also included: these are Brook Road, Bradwell Road, Marsh Road, Vicarage Lane, Casey Lane, Chapel Lane and Marlborough Avenue.

An electoral ward in the same name exists. This ward includes Bradwell-on-Sea and had a total population at the 2011 Census of 2,182.

Essex, typically receives less than 500mm of rain per year, compared with the UK average of around 1,100mm. Tillingham along with other parts of the Dengie Peninsula and coastal zones near Clacton and Bradwell-on-Sea are especially dry, with as little as 400mm of rain per year.

Tillingham is mentioned on page 174 of the H. G. Wells novel The War of the Worlds. It is the place where the narrator's brother arrives at the coast following his escape from London during the Martian invasion. The full novel was first published in hardcover in 1898 by William Heinemann. The War of the Worlds is one of the earliest stories to detail a conflict between humankind and an extraterrestrial race.