Arms of The Corporation of the City of Sarnia
Blazon
Or a fess wavy Azure voided Argent above a base enarched paly Sable and Argent in dexter chief a lymphad Gules sails Argent and in sinister chief a garb Or fimbriated Azure;
Crest of The Corporation of the City of Sarnia
Blazon
A mural crown of three towers Argent masoned Azure charged with twelve Guernsey lily (Nerine sarniensis) proper six visible;
Motto of The Corporation of the City of Sarnia
Blazon
SARNIA SEMPER. This Latin phrase means "Sarnia forever".