ARMS: Quarterly Or and Gules four Lions passant guardant counterchanged a Fesse Vert charged with three Eagles displayed of the first.
CREST: On a Wreath Or and Vert on a Mount Vert a Port between two Towers Or issuant therefrom a Plume of three Ostrich Feathers Argent.
SUPPORTERS: On either side a Sea Dragon per fesse Gules and proper.

Motto 'CADERNID GWYNEDD' - The strength of Gwynedd.
Granted 21st July 1949.

Picture courtesy of Laurence Jones.

The shield combines the arms of two great native Princes of Wales - the lions of Llewelyn the Last, and the eagles of Owain Gwynedd. The eagles have long been associated with the County, and according to Michael Drayton they appeared on the banner borne by the men of Caernarvonshire at Agincourt.
The castle stands for the great strongholds in the County - Caernarvon, Conway, and Criccieth. The feathers of the Heir Apparent are a token of the traditional link between the Princes of Wales and the County.
The supporting sea-dragons allude to the maritime situation of Caernarvonshire, and the rocky base on which they rest refers to its coast and mountains.
The motto, derived from the eleventh-century Mabinogion, refers to the rugged fast­nesses of Caernarvonshire.

ARMS: Argent a Lion rampant Sable a Chief barry wavy Or and Azure.
CREST: On a Wreath Argent Gules Or Purpure Argent and Azure a demi Lion Gules gorged with a Mural Crown Or supporting with the dexter fore claw an escutcheon quarterly Sable Argent Gules and Azure thereon a Ram's Head caboshed proper; Mantled Gules doubled Or.

Motto 'DUW A DIGON' - With God, enough.
Granted 12th March 1962.

No further information currently available.

ARMS: Per fesse Sable and Gules masoned Argent a Cross fillet Or in the first quarter a pair of Mill Rolls palwise proper the necks Gold in the second quarter an open Scroll of Parchment also proper.
CREST: On a Wreath Or and Sable a Dragon passant Gules breathing fire proper gorged with a Collar of Steel also proper with a Chain of the same attatched thereto passing between the forelegs and reflexed over the back and resting the dexter foreclaw on an Ingot of Steel likewise proper.

Motto 'IECHYD AC ADDYSG' - Health and learning.
Granted 10th March 1958.

The upper half is black to symbolise the coalfields of Ebbw Vale and the lower half red masoned white to represent the urban status of the district. The pair of mill rolls refer to the important steel industry, the parchent scroll to education, and the masoned division may also be said to allude to brickworking. Over all is set a golden cross emblematic of the Christian community long flourishing in Ebbw Vale and expressive of its aspirations.
The red dragon is for Wales breathing fire in allusion to Ebbw Vale's furnaces. For necessary heraldic difference and in emphasis of the district's flourishing steel industry the dragon has been collared and chained with steel and rests its claw on an ingot of the same metal.

ARMS: Barry wavy of eight Argent and Azure on a Pile Azure a Lion rampant between three Cross Crosslets Or.
CREST: Out of a Coronet composed of four ears of Wheat and as many Acorns leaved set upon a Rim Or a Munt of Heath proper thereon in front of a Lion holding between the fore-paws a Maltese Cross Argent a Portcullis chained Gold nailed Azure; Mantled Azure doubled Or.

Motto 'GLORIA RURIS DIVINA' - The glory of the countryside is divine.
Granted 20th January 1964.

Picture thanks to the West Glamorgan Archive Service.

The eight alternate white and blue wavy horizontal bands with a blue triangle pointing downward from the top, represent the peninsula surrounded by sea. The both the gold rampant lion and the three gold cross crosslets appear in the arms of the ancient Lords of Gower, the de Breos family and the Earls of Warwick. The crosses represent the Earls of Warwick, and the crosses and lion the de Breos family.
The golden coronet, with four ears of corn and four acorns symbolises the importance of agriculture and woodland, and to remind us that Gower is designated an area of outstanding natural beauty. The "mount of heath", is a pun on the name of Mrs Winifred Heath, who donated the Grant of Arms to the Council. The gold portcullis is an emblem of the Dukes of Beaufort, the most recent Lords of Gower. The white lion is an emblem both of the Mowbray and Herbert families, both Lords of Gower, and the Maltese cross reminds us of the link with the Knights Hospitallers who held the manors of Berry and Millwood in Gower.

ARMS: Azure on a Bar wavy Argent a Barrulet wavy of the first and over all a Pallet Sable in chief a Hammer and Pick in Saltire Argent between two Ears of Wheat Or and in base a Lion rampant also Argent a Bordure of the last charged with nine Martlets Sable.
CREST: On a Wreath of the Colours on three Towers conjoined Argent a Dragon passant Gules holding in the dexter claw a Feather also Argent.

Motto 'GORAU NAWDD NAWDD DUW' - The best protection, the protection of God
Granted 23rd December 1954.

No further information currently available.

ARMS: Per fesse Or and barry wavy Azure and Argent on a Mount Vert in base point a Tower double-towered Gules between two Lymphads issuant from the fesse line Sable flags and pennons per fesse of the third and Vert the sails also Gules charged with a Clarion Gold.
CREST: Out of a Mural Crown Sable a demi Eagle displayed wings inverted Or incensed proper and gorged with a Collar of Steel also proper pendent therefrom an Escutcheon Argent charged with the astronomical sign for Mars also Sable; Mantled Azure doubled Or.
SUPPORTERS On either side a Dragon Gules gorged with an ancient Crown Or pendent therefrom an Escucheon that on the dexter Or three Chevronels Gules that on the sinister quarterly Argent and Gules fretty Or a bendlet Sable.
BADGE: Upon an Oval barry wavy of six Argent and Azure environed of a Steel Hawser proper and ensigned with an ancient Crown Or a Tower as in the Arms,

Motto 'TU NIDAM SERVAS'- ?
Granted 20th February 1961.

The arms are heavily based on the Borough seal. The two black ships represent the coal trade with the blue and white waves representing the river below. The flags flying from the ships' masts are green and white, the colours of Wales, and the gold clarion on the sails are from the arms of Richard de Granville, Lord of Neath, Constable of the Castle of Neath and founder of Neath Abbey. The red tower on a green base represents the castle on the river bank.
The symbol of Mars is generally used to represent metal working. The two red dragons are symbols of Wales. The one on the left carries the arms of the de Clare family, Lords of Glamorgan, while the one on the right carries the arms of Hugh de Despenser, Lord of Gower,.

ARMS: Per pale Or and Sable a Pale paly wavy of four Vert and Argent between seven Gouttés d'Huile and as many Gouttés d'Or on a Chief Gules three Clarions Gold.
CREST: Out of a Circlet Gules charged with three Escallops Or a Mount Vert thereon a Lamb passant proper unguled Gold gorged with a Collar Sable charged with three Bezants pendent therefrom a Buglehorn stringed also Sable and supporting a Staff Or flying therefrom a Banner also Gules charged with three Chevrons Argent.

Motto 'ONI HEUIR NI FEDIR' - You cannot reap unless you sow.
Granted 1st June 1952.

The three clarions are taken from the arms of Neath Abbey, which were in turn taken from the arms of Sir Richard de Glanville, the Lord of Neath, who was instrumental in founding the abbey. The four alternate green and white wavy lines symbolise the white rivers and green valleys of the district. The gold field to the left is the the colour of ripe corn, representing agriculture. The seven drops of oil, symbolising the importance of the oil industry, and also reflecting the colours of BP Llandarcy which sponsored the Grant of Arms. The black field represents coal-mining with seven golden droplets, representing the smelting industries. Together the fourteen droplets represent the fourteen parishes which made up the Rural District.
The wreath and mantling are in the two principal colours of the shield. The red band with three gold scallop shells echoes the collars worn by the supporters of the Earl of Jersey's arms. The lamb is the emblem of both the Williams family of Aberpergwm and the Llewellyn family of Ynysygerwn, later Penllergaer. The lamb wears a black collar with three gold roundels, derived from the arms of the Tennant family of Cadoxton, and the black hunting-horn is the symbol of the Vaughan family of Rheola. Finally the banner shows the arms of Iestyn ap Gwrgan, the warlike ancestor of both the Llewellyn and Williams families.