ARMS: Azure a representation of the Sword in its Scabbard of the St Edmundsbury Borough Council proper between in fess two pairs of Arrows each in saltire points downwards Argent enfiling an Ancient Crown Or.
CREST: On a Wreath of the Colours upon a Grassy Mount a Wolf sejant proper resting the dexter paw upon a King's Head couped at the neck also crowned Or; Mantled Gules doubled Argent.
SUPPORTERS: Dexter a Lion chevronny Or and Gules charged on the shoulder with a Roundel Gules fretty Or sinister an Ounce Sable bezanty gorged with a Collar compony counter compony Argent and Azure and charged on the shoulder with a Roundel Or fretty Sable.

Motto 'SACRARIUM REGIS CUNABULA LEGIS' - Shrine of the King, cradle of the law.
Granted ?.

The Borough of St. Edmundsbury was formed by the amalgamation of Borough of Bury St. Edmunds, the Haverhill Urban District, the Clare Rural District and the Thingoe Rural District.

NOTE - ON 1st APRIL 2019 ST. EDMUNDSBURY BOROUGH MERGED WITH FOREST HEATH DISTRICT, TO FORM A NEW DISTRICT CALLED WEST SUFFOLK AND CEASED TO EXIST.

The blue background and the ancient crowns and crossed arrows are from the arms of the former Borough of Bury St. Edmunds . They depict the crown of Edmund, the Martyr King of East Anglia from whom the town takes its name; the arrows refer to the manner of his death in 869 at the hands of the Danish invaders for refusing to renounce his Christian faith. Similar crowns are contained in the arms of the diocese of St. Edmundsbury and Ipswich and were also included in the Arms of the former West Suffolk CC. According to traditional accounts King Edmund went with his army and fought a battle with them but was defeated and captured. The Danes tied him to a tree and shot him to death with arrows.
The possession of a mace is usual for every corporation, a right granted by the Charter of Incorporation. Rare is the right to have a Sword and has always been more sparingly granted. Bury St. Edmunds was one of a limited number of towns to receive such a Grant to the Alderman, Chief Burgesses and Burgesses of the Common Council of Bury St. Edmunds by Charles II on 3rd July 1684. The former Corporation's Minute Book records that on 2nd October 1684 thanks were given to Sir Thomas Hervey for the gift of the Mayor's Sword which he presented upon the King creating Bury St. Edmunds a "Mayor Town". Although Charles II Charter of 1684 was declared null and void when his brother James II fled the country in 1688, the sword continued to form part of the insignia of the Borough and is thus represented in the current arms.
The crest recalls the legend that after the Danes had killed Edmund and left, the King's subjects returned to bury him and found his body, but the head was missing. Searching for the head they heard a voice in the forest cry out "Here I am". Moving towards the voice they saw a wolf standing over the head, as if guarding it. On their approach the wolf disappeared and they took up the head which was afterwards miraculously joined to the body, which was eventually brought to Bury St. Edmunds for burial. The story is told in the writings of Abbot of Fleury, a French scholar who died in 1004 so it must have been believed soon after it is said to have happened. Hence the crest of a wolf guarding a crowned head of a King. The grassy mount or hill may be taken as a reference to Haverhill.
The gold lion is a royal beast and its red chevrons are inspired by the arms of the de Clares, a family from whom the town of Clare derived its name. The Clare RDC used a similar device. The other supporter is derived from the crest of the former Thingoe RDC, where it was taken from the arms of the Marquis of Bristol of Ickworth. The roundels on each supporters' shoulders with a fretty design are an allusion to Haverhill - a fret being reminiscent of weaving - an industry which was once carried on in the town to a greater extent than at present.

ARMS: Barry wavy of eight Azure and Argent a Lymphad sail set Or flying flags and pennon of St. George on a Chief Or three Pellets that in the centre charged with a Cross engrailed and the others each with an Escallop of seven lobes Or.
CREST: On a Wreath of the Colours in front of a Port between two square Towers proper issuant therefrom a rising Sun of seven rays a Mitre Or.
BADGE: A Heptagon Azure fimriated Argent and charged with a Lymphad as in the Arms.

Motto 'NEW VIEWS TO LIFE'.
Granted 10th December 1975.

The Suffolk Coastal District was formed by the amalgamation of the Borough of Aldeburgh, the Felixstowe Urban District, the Leiston-cum-Sizewell Urban District, the Saxmundham Urban District, the Woodbridge Urban District, the Blyth Rural District and the Deben Rural District.

NOTE - ON 1st APRIL 2019 SUFFOLK COASTAL DISTRICT MERGED WITH WAVENEY DISTRICT, TO FORM A NEW DISTRICT CALLED EAST SUFFOLK AND CEASED TO EXIST.

The basic pattern of the shield - stylized blue and white waves with a chief - follows that of the Deben RDC arms and the shield used by Woodbridge UDC. The waves represent the sea and the main rivers of the area - the Orwell, Deben, Alde and Blyth. The lymphad or ancient galley representing the shipping of the coast and rivers and also the boatbuilding industry. The ship is gold with pennon and flags of St. George and recalls the ship in the arms of the Deben RDC and the Borough of Aldeburgh and the East Suffolk CC, while the waves are also seen in the shield used by the Felixstowe UDC. The chief indicates the name of the authority. "Suffolk" is suggested by the gold engraild cross on black, being the main emblem of the former East Suffolk CC and representing the de Ufford Earls of Suffolk, seen also in Deben's crest. The "Coastal" is denoted by two gold scallop shells, each with seven lobes for the seven former council areas. These emblems are also from the arms of the Seckford family, and are seen in the Deben crest and the Woodbridge device, and also that of Felixstowe.
The castle refers to the historic associations with the castles of Framlingham and Orford. The mitre, like that in the Felixstove device, recalls the ancient bishopric founded at Dunwich by St. Felix. The mitre also alludes to other important monastic and ecclesiastical associations with Leiston, Felixstowe, Woodbridge and Blythburgh. The rising sun is indicative of the easterly situation it also predicts the dawn of a new era for the seven communities in one, symbolized by its seven rays.
The motto carries on the theme of a new era for the Suffolk Coastal area and is from "The Library" by the famous local poet George Crabbe.