| Pacific Squadron | |
|---|---|
 | |
| Active | 1820-1910 |
| Country |  United States of America |
| Branch |  United States Navy |
| Type | Naval squadron |
The Pacific Squadron of the United States Navy, established c. 1821 and disbanded in 1907, was a naval squadron stationed in the Pacific Ocean in the 19th and early 20th centuries.
Developing from a small force protecting United States commercial shipping interests in the Pacific waters off South America, North America and Hawaii, and initially lacking United States ports in the Pacific and operating out of storeships that provided naval supplies, while obtaining food and water from local ports of call in the Hawaiian Islands and towns on the Pacific Coast, the squadron eventually expanded its size and reach as US naval power and national interests grew in the 19th and 20th Centuries.
The small initial force expanded its scope of operations to include the Western Pacific in 1835, when the East India Squadron joined the force; by Mexican–American War period over one-half of the United States Navy was sent to join the Pacific Squadron. During the American Civil War, the squadron was reduced in size when its vessels were reassigned to Atlantic duty.
When the Civil War ended the squadron was reinforced again, until being disbanded just after the turn of the 20th century. The squadron was superseded by the establishment of the United States Pacific Fleet and the ships and personnel of the Pacific Squadron became the Pacific Fleet's Second Squadron.