Essex on Wikipedia.

Alresford, the ruins of St. Peter, burnt down in a fire in 1971. The churchyard is still in use. The church was replaced  - St. Andrew and St. Peter. TM 068 213. Both © Les Needham.

Barking, St. Margaret. A rather heavily processed old postcard, Bulman Collection. Link.
Barling Magna, All Saints. TQ9389. © Julieanne Savage.
Basildon.
Benfleet, Holy Family Church (R.C.). © Mark Summers. Link.
Blackmore, Priory Church of St. Lawrence. © Alan Wilson.
Bocking, St. Mary the Virgin. As can be seen from the church website, the tower finials have been reduced or removed since this postcard was published. From an old postcard, Geoff Watt's Collection. Link.
Borley, dedication unknown. © Mark Turbott.
Brentwood.
Bulphan, St. Mary the Virgin. Interior view. 177 TQ 636 858. Link1. Link2. Zion Hall Interdenominational Chapel. 177 TQ 639 859. All © Dave Westrap.
Burnham-on-Crouch, St. Mary the Virgin. © Bill McKenzie.

Canvey Island.
Chelmsford.
Chipping Ongar, St. Martin. Another view. Both © Bill McKenzie.
Churchend, on Foulness Island. Rebuilt in 1848. Much of the island is under the Ministry of Defense, so access is limited. TR 0093. © Julieanne Savage. Link.
Colchester.
Corringham, St. Mary the Virgin. © Mark Summers. Link.

Dedham, St. Mary the Virgin. The former U.R.C., now a craft centre (thanks to Les Needham for advising the former denomination). Both © Steve Bulman. Another view of St. Mary. © Judith Anderson.

East Horndon, All Saints, is now in the care of the Churches Conservation Trust, but still holds occasional services. The graveyard is still in use. Photo © Brian Thompson. Additional information kindly supplied by Linda Golding.
Eastwood, St. David. TQ 8289. © Julieanne Savage. Link.

Fairstead, St. Mary the Virgin and St. Peter. From an old postcard in Geoff Watt's Collection. Link.
Fobbing, St. Michael. © Mark Summers. Link.
Frinton. Thanks to Dave Westrap for identifying this church as St. Mary the Virgin, and for providing the links at the end of the entry. From an old postcard, Geoff Watt's Collection. Link1. Link2. Link3.
Fryerning, St. Mary the Virgin. © Alan Wilson. Link.

Grays, Bethel Full Gospel Church at South Stifford. © Alan Taylor.
Great Hallingbury, dedicated to St. Giles. © Robert Mather. 167 TL 512 196.
Great Wakering, St. Nicholas. TQ 9487. © Julieanne Savage.
Greensted, St. Andrew. Dating from 1060, it's the only surviving Saxon church, and supposedly the oldest wooden building anywhere. © Bill McKenzie. Another view. From an old postcard (franked 1906), Bulman Collection.

Hadleigh, St. James the Less. From an old postcard, Geoff Watt's Collection. Link.
High Ongar, St. Mary. © Alan Wilson.
Horndon-on-the-Hill, St. Peter. © Brian Thompson.
Hutton, All Saints. © Bill McKenzie.

Laindon, St. Nicholas. © Brian Thompson.
Langdon Hills.
Langford, St. Giles. Another view. Both © Steve Taylor. Link.
Leigh-on-Sea, St. Clement. From an old postcard, Bulman Collection.
Little Wakering, All Saints. TQ 9388. © Julieanne Savage.

Manuden, St. Mary the Virgin. © Nadine Pedley. Link.
Mount Bures, St. John the Baptist. © Roger Heap.

Navestock, St. Thomas the Apostle. © Peter Hobday.
Noak Hill, St. Thomas. TQ 541 940. © Peter Hobday.
North Ockenon, St. Mary Magdalene. TQ 587 848. © Peter Hobday.
North Shoebury, St. Mary. TQ 9286. © Julieanne Savage.
North Stifford, St. Mary. © Mark Summers. Link.

Orsett, St. Giles & All Saints. © Brian Thompson.

Pitsea, the remains of St. Michael. © Mark Summers.
Prittlewell, St. Mary the Virgin, has some fragments from as early as the 11th century, but is mostly 15th century. © Brian Thompson. Another view from an old postcard, Bulman Collection.

Radwinter, St. Mary the Virgin. From an old postcard, Bulman Collection. The postcard was badly faded, and has hence been heavily processed to recover as good an image as possible.
Rawreth, St. Nicholas, a re-build of 1882. © Brian Thompson.
Rayleigh.

Saffron Walden, St. Mary the Virgin. From an old postcard (franked 1904), Bulman Collection. Link.
St. Osyth, the gatehouse of the Priory, now a private residence. From an old postcard, Bulman Collection. Link.
Shoeburyness, St. Andrew. From an old postcard, Geoff Watt's Collection. Link.
South Benfleet.
South Ockendon, St. Nicholas. TQ 594 829. © Neil Davies. Link1. Link2 (towards bottom of the page).
Southchurch, Holy Trinity. According to its web-site, the church was extended in the early years of the 20th century. The picture on this web-site would appear to date to before the modern works began. It's postmarked 1905. From an old postcard, Bulman Collection.
Southend-on-Sea, St. Laurence and All Saints at Eastwood. © Geoff Watt. Link.
Stanford-le-Hope, St. Margaret of Antioch, of Norman foundation, restored in Victorian times, it still retains much earlier stonework, and some fine carvings. Tombs and monuments of the Fetherston and Scratton families. © Brian Thompson.

Thundersley.
Tillingham, St. Nicholas. TL 993 038. © Tony Preston.
Toppesfield, St. Margaret of Antioch. Wooden porch. TL 739 374. Both © Steve Taylor.

Vange, All Saints. © Mark Summers. Link.

Wennington, St. Mary & St. Peter. TQ 539 809. © Peter Hobday. Link.
West Bergholt, St. Mary Old Church. © Roger Heap.
Westcliff on Sea, U.R.C. © Brian Thomson.
Wivenhoe, St. Mary the Virgin. TM 039 215. © Les Needham. Link.
Writtle, All Saints. Link. U.R.C. Both © Geoff Watt.