A Life Grenadier Regiment may refer to:
Life Regiment Grenadiers (I 3), Swedish military unit Life Grenadier Regiment (Sweden) (I 4), Swedish military unit 1st Life Grenadier Regiment (Sweden) (I 4), Swedish military unit 2nd Life Grenadier Regiment (Sweden) (I 5), Swedish military unit Life Grenadier Regiment of the Royal Prussian Guard, once commanded by Hans Sigismund von Lestwitz Royal Saxon 1st (Life) Grenadier Guard Regiment (No. 100), of the Royal Saxon Army Life-Guards Grenadier Regiment of the Russian Imperial Guard