[3] Constituted 1 June 1821 in the Regular Army as the 1st Regiment of Artillery, and organized from existing units with headquarters at Fort Independence (Massachusetts).

Order of battle information shows that batteries of the regiment deployed outside the U.S. in the Spanish–American War of 1898.

[5] Regiment broken up 13 February 1901 and its elements reorganized and redesignated as separate numbered companies and batteries of the Artillery Corps.

[3] Reconstituted 1 July 1924 in the Regular Army as the 1st Coast Artillery and partially organized with headquarters at Fort De Lesseps, Panama Canal Zone in the Harbor Defenses of Cristobal on the Caribbean side of the Panama Canal.

The regiment was organized by redesignating the 2nd, 3rd, 4th, 7th, 8th, 10th, and 11th companies of the Coast Artillery Corps (CAC).

1st Battalion provided cadre for organization of 72nd Coast Artillery (AA) Regiment at Fort Randolph 1 November 1939.

[3] 1st Coast Artillery Battalion disbanded 1 February 1946 at Fort Sherman, Canal Zone.

Inactivated 1 September 1958 at the United States Army Chemical Center, Maryland.

[12] On a wreath of the colors, argent and gules, a palmetto tree vert behind an arm embowed habited in the artillery uniform of 1861 issuing from the upper portion of an embattled tower and grasping a rammer staff fessways all or.

With two white stripes, alluding to the campaign streamer of the War of 1812, the age of some of the units of the regiment is depicted.

The snake and cactus, from the State Seal of Mexico, represent the Mexican War.

[12] The arm and rammer staff rising out of a tower in front of a palmetto tree indicate participation in the Civil War at Fort Sumter.