美國The Columbia-class submarine, formerly known as the Ohio Replacement Submarine and SSBN-X Future Follow-on Submarine, is a future United States Navy nuclear submarine class designed to replace the Trident missile-armed Ohio-class ballistic missile submarines. The first submarine is scheduled to begin construction in 2021 and enter service in 2031 (some 50 years after its immediate predecessor, the Ohio class, entered service). From there, the submarine class will serve through 2085.

 The Columbia-class submarine is being designed to replace the Ohio-class ballistic missile submarines. The Ohio class of submarines are aging and the first boat in that class is scheduled to be decommissioned in 2027 with the remaining scheduled to be decommissioned yearly following the first boat's decommissioning. The Columbia class's role in the fleet will be to replace the decommissioned Ohio-class submarines and maintain the submarine presence in the United States’ strategic nuclear force.

Although still evolving, the following are some of the ship characteristics for the SSBN(X) design:

• Expected 42-year service life (it is planned that each submarine will carry out 124 deterrent patrols during its service life)Life-of-the-ship nuclear fuel core that is sufficient to power the ship for its entire expected service life, unlike the Ohio-class submarines, which require a mid-life nuclear refueling.

 哥倫比亞級潛艇（英語：Columbia-class submarine），又稱俄亥俄級替換者潛艇（英語：Ohio Replacement Submarine），是美國海軍開發中的核子潛艇，用於取代俄亥俄級下一代核子潛艇。預計2021年開始設計、建造，2031年服役。

美國海軍考慮從新一代維吉尼亞級核能攻擊潛艦加裝長約30m的彈道飛彈船段 ，成為接替俄亥俄級的新一代彈道飛彈

哥倫比亞級由通用電器船舶（GDEB）負責，綠色部分由（New Port News）負責。由此可見用電器船舶負責涵蓋艦體大部分長度的主體耐壓殼（含反應器、推進系統段）、噴泵推進器等，而新港紐斯負責艦首（含聲納與魚雷發射管）、帆罩、背部上層結構（非耐壓構造）、艦尾航行控制（含X尾舵）武器系統等部位。 

美國海軍宣布將SSBN(X)首艦命名為哥倫比亞號（USS Columbia）；哥倫比亞（District of Columbia）是美國首都華盛頓特區（Washington, D.C.）的正式名稱。

美國海軍正式將SSBN(X)首艦命名為哥倫比亞號，舷號確認為 SSBN-826.

12艘哥倫比亞級的舷號將涵蓋SSN-826~837。