| PIRATE'S COVE ESTATES, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Oct 26, 1979 | Inactive |
| REGNA ELECTRIC AND CONSTRUCTION, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Oct 31, 1979 | Inactive |
| SOUTHWING, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jan 7, 1980 | Inactive |
| BHF CORPORATIONBig Pine, FL · Inactive | Big Pine, FL | Corporation | Jan 21, 1980 | Inactive |
| ROYAL PALM R. V. PARK, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Corporation | Jan 23, 1980 | Active |
| LOWER KEYS REALTY, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Mar 14, 1980 | Inactive |
| WILLIAM AND MARGARET LEE WRIGHT ENTERPRISES, I NC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Mar 26, 1980 | Inactive |
| BETTY M. BROTHERS REAL ESTATE, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jul 21, 1980 | Inactive |
| GENO'S TRUCKING & PAVING CO., INC.Location not reported, FL · Inactive | Location not reported, FL | Corporation | Sep 2, 1980 | Inactive |
| BIG PINE FLORIST AND GIFTS, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Sep 10, 1980 | Inactive |
| BIG PINE FURNITURE & SHELLS, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Sep 29, 1980 | Inactive |
| WALVEY CORPORATIONBig Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jun 24, 1981 | Inactive |
| BIG PINE BALTIMORE OYSTER HOUSE, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jul 28, 1981 | Inactive |
| LOWER KEYS CHAMBER OF COMMERCE, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Oct 11, 1963 | Active |
| THE BIG PINE KEY VOLUNTEER FIRE DEPARTMENT,INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Nov 22, 1963 | Inactive |
| BIG PINE UNITED METHODIST CHURCH, INCORPORATEDBig Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Jun 5, 1964 | Active |
| SEACAMP ASSOCIATION, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Mar 11, 1966 | Active |
| THE BIG PINE KEY GOLF ASSOCIATION, INC.Location not reported, FL · Inactive | Location not reported, FL | Nonprofit | Aug 21, 1967 | Inactive |
| EL CLUB DE LOS 50, INC.Location not reported, FL · Inactive | Location not reported, FL | Nonprofit | Oct 24, 1967 | Inactive |
| BIG PINE KEY CIVIC ASSOCIATION, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Jul 8, 1968 | Inactive |
| FIRST BAPTIST CHURCH OF BIG PINE KEY FLORIDA, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Jul 21, 1975 | Active |
| BIG PINE KEY CHAPTER #2466 OF AARP, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Mar 23, 1976 | Active |
| PORT PINE HEIGHTS PROPERTY OWNERS ASSOCIATION, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Apr 22, 1977 | Active |
| BIG PINE KEY LODGE NO. 1585 LOYAL ORDER OF MOOSE, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Aug 9, 1977 | Active |
| CORAL SHORES PROPERTY OWNERS ASSOCIATION INCORPORATEDBig Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | May 5, 1978 | Inactive |
| BIG PINE ATHLETIC ASSOCIATION, INC.Big Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Jan 24, 1979 | Active |
| FRIENDS OF SCOUTS, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Apr 23, 1979 | Inactive |
| JOLLY ROGERS ESTATES PROPERTY OWNERS ASSOCIATIONIATION, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Jul 26, 1979 | Inactive |
| FLOTILLA 13-3, INC.Big Pine, FL · Inactive | Big Pine, FL | Nonprofit | Jun 23, 1980 | Inactive |
| LOWER FLORIDA KEYS MULTIPLE LISTING SERVICE, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Dec 19, 1980 | Inactive |
| BIG PINE KEY JAYCEES, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Nonprofit | Jun 24, 1983 | Inactive |
| LORD OF THE SEAS LUTHERAN CHURCH, INCORPORATEDBig Pine Key, FL · Active | Big Pine Key, FL | Nonprofit | Sep 13, 1983 | Active |
| SEA CENTER INCBig Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jun 7, 1968 | Inactive |
| UP THE CREEK, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Sep 13, 1979 | Inactive |
| MCPHALL EXCAVATING, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Jan 13, 1981 | Inactive |
| COOK CAY CHARTERS, LTD. INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Dec 7, 1982 | Inactive |
| KOSTAS INVESTMENT PARTNERSHIP, LTD.Big Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Mar 25, 2004 | Inactive |
| BIG PINE KEY III, LIMITED PARTNERSHIPBig Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Jul 6, 2004 | Inactive |
| BIG PINE KEY IV LIMITED PARTNERSHIPBig Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Jul 6, 2004 | Inactive |
| BIG PINE KEY FISHING LODGE, LLLPBig Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Feb 9, 2007 | Inactive |
| STILCO LTD.Big Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | May 21, 1981 | Inactive |
| CASTAWAYS/BREEZY PINES ASSOCIATES, LTD.Big Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Nov 29, 1984 | Inactive |
| BIG PINE KEY LIMITED PARTNERSHIPBig Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Dec 3, 1997 | Inactive |
| BULLDOG VENTURES FAMILY LIMITED PARTNERSHIPBig Pine Key, FL · Inactive | Big Pine Key, FL | Partnership | Jun 17, 2021 | Inactive |
| MALVA FAMILY HERITAGE, IRRV TRBig Pine Key, FL · Active | Big Pine Key, FL | Other | Feb 24, 2025 | Active |
| PARADISE FAMILY HOLDINGS IRRV TRBig Pine Key, FL · Active | Big Pine Key, FL | Other | Feb 24, 2025 | Active |
| IZZY DIVING INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Aug 17, 2000 | Inactive |
| COLL'S AUTOMOTIVE, INC.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Feb 20, 2001 | Inactive |
| DIDEROT EDUCATIONAL SALES CORPORATIONLittle Torch Key, FL · Inactive | Little Torch Key, FL | Corporation | Mar 22, 2001 | Inactive |
| JEFFREY B. MEYER, P.A.Big Pine Key, FL · Inactive | Big Pine Key, FL | Corporation | Oct 9, 1980 | Inactive |