What are the ranks in the Navy Seals?

Most Navy SEALs (about 2,000) are enlisted men who hold the rank of E-4 to E-9 (Petty Officer 3rd Class to Master Chief Petty Officer). They are led by roughly 500 SEAL Officers who hold the rank of O-1 to O-10 (Ensign to Admiral Chief of Naval Operations). There are also a few SEAL Warrant Officers (perhaps 30 or so) who rank as officers above the senior-most Enlisted but lower than a Commissioned Officer.

Like every military organization, there is a command structure, which requires having different ranks. The same is true of SF, Rangers, Delta, MARSOC, etc. There are no military organizations where everyone is the same rank.

If you instead meant “Do Navy SEALs have unique ranks?” then the answer is no. The SEALs are part of the Navy and use Navy ranks.

U.S. Navy SEALs Ranks – Enlisted, from Lowest to Highest

E-4 Insignia of a Navy Petty Officer Third Class Petty Officer Third Class PO3 Noncommissioned Officer
E-5 Insignia of a Navy Petty Officer Second Class Petty Officer Second Class PO2 Noncommissioned Officer
E-6 Insignia of a Navy Petty Officer First Class Petty Officer First Class PO1 Noncommissioned Officer
E-7 Insignia of a Navy Chief Petty Officer Chief Petty Officer CPO Senior Noncommissioned Officer
E-8 Insignia of a Navy Senior Chief Petty Officer Senior Chief Petty Officer SCPO Senior Noncommissioned Officer
E-9 Insignia of a Navy Master Chief Petty Officer Master Chief Petty Officer MCPO Senior Noncommissioned Officer

U.S. Navy SEALs Ranks – Officers, from Lowest to Highest

O-1 Insignia of a Navy Ensign Ensign ENS Junior Officer
O-2 Insignia of a Navy Lieutenant Junior Grade Lieutenant Junior Grade LTJG Junior Officer
O-3 Insignia of a Navy Lieutenant Lieutenant LT Junior Officer
O-4 Insignia of a Navy Lieutenant Commander Lieutenant Commander LCDR Junior Officer
O-5 Insignia of a Navy Commander Commander CDR Senior Officer
O-6 Insignia of a Navy Captain Captain CAPT Senior Officer
O-7 Insignia of a Navy Rear Admiral Lower Half Rear Admiral Lower Half RDML Flag Officer
O-8 Insignia of a Navy Rear Admiral Rear Admiral RADM Flag Officer
O-9 Insignia of a Navy Vice Admiral Vice Admiral VADM Flag Officer
O-10 Insignia of a Navy Admiral Admiral ADM Flag Officer