Incorporated into : 1974 : Knowsley
Arms : Azure a Pair of Scales Or between in chief two Bees volant proper and in base a Cross Moline Gold.
Crest : Out of a Coronet composed of four Roses Gules barbed and seeded proper set upon a Rim Or a Mount Vert thereon a Cormorant wings elevated and addorsed holding in the beak a Slip of Oak leaved and fructed also proper, Mantled Azure doubled Argent.
Motto: 'FIDE ET INDUSTRIA' - By faith and industry
The arms were officially granted on November 25, 1958.
The gold cross upon the blue background of the shield is the heraldry of the Molyneux family, Earls of Sefton, who eventually possessed the whole manor of Kirkby. The gold pair of scales represents the balanced industries of the great trading estate at Kirkby, and the two bees symbolise the community working and living together here as a complete social unit. A heraldic play on the place name is also incorporated with the cross (representing the old parish church around which the Urban District has developed) and the bees - Kirk-by.
The mantling is in blue and white, which are the livery colours of the Earls of Derby who formerly held a moiety of the manor of Kirkby until it was acquired by the Molyneux family. The crest above the helm comprises a coronet of Lancaster, being a gold rim set with four roses (only three visible) which are here intended to stand for the four areas of Northwood, Old Kirkby, Southdene and Westvale. The celebrated cormorant, or liver bird, from the arms of the City of Liverpool, represents the part played by that city in the development of modern development of Kirkby. Instead of having the familiar seaweed, or laver, in its beak, the bird holds an oak sprig with an acorn which not only symbolises the sturdy and steady growth of the new Urban District from a small beginning but also serves as a reminder that much of Kirkby's original rural character is still being preserved within its boundaries.
The motto re-iterates the connection between the church and this modern industrial town, fusing two ideals which are both always applicable.