| BETTER HOME HEAT COUNCIL INC. OF SOUTHWESTERN CONNECTICUT | — | 0061857 | 1951-03-30 | Revoked | |
| BEVERLY SHOPS, INCORPORATED | — | 0005222 | 1951-01-25 | Dissolved | NONE |
| BLOOMFIELD MACHINE COMPANY THE | — | 0005465 | 1951-03-14 | Dissolved | WINDSOR |
| BOLTON LAKE SHORES ASSOCIATION, INCORPORATED, THE | — | 0052078 | 1951-06-13 | Active | BOLTON |
| BRADLEY'S EXPRESS, INCORPORATED | — | 0005886 | 1951-04-09 | Revoked | |
| BRANCHVILLE SERVICE AND OIL COMPANY, THE | — | 0005914 | 1951-07-20 | Active | RIDGEFIELD |
| BRANFORD MANUFACTURING COMPANY THE | — | 0005961 | 1951-10-10 | Revoked | |
| BRANFORD SECURITIES, INCORPORATED | — | 0005968 | 1951-06-13 | Dissolved | NONE |
| BRANWIN COMPANY THE | — | 0090299 | 1951-01-05 | Dissolved | |
| BRIDGEPORT CLOAK MAKERS' LOCAL 141 CREDIT UNION, INCORPORATED | — | 0104166 | 1951-02-28 | Merged | |
| BRIDGEPORT LUMBER SALES CORPORATION THE | — | 0006140 | 1951-01-02 | Dissolved | |
| BRIDGEPORT PONY LEAGUE INCORPORATED | — | 0061882 | 1951-05-01 | Revoked | NONE |
| BRISTOL GENERAL MANUFACTURING COMPANY, INCORPORATED THE | — | 0090304 | 1951-04-26 | Revoked | FORESTVILLE |
| BRISTOL GRANGE NO. 116 P. OF H., INCORPORATED, THE | — | 0052214 | 1951-04-02 | Revoked | |
| BROTHERS DRY CLEANERS AND DYERS, INC. | — | 0006413 | 1951-12-31 | Dissolved | |
| BRUNETTE TOOL COMPANY, INCORPORATED | — | 0006490 | 1951-06-21 | Revoked | |
| BRYCE GEAR, INC. | — | 0006521 | 1951-11-02 | Active | PLAINVILLE |
| BSI LIQUIDATING CORPORATION | — | 0082104 | 1951-06-29 | Withdrawn | |
| BUCKINGHAM ATHLETIC CLUB, INCORPORATED | — | 0052280 | 1951-08-08 | Revoked | |
| BUCKINGHAM CHILD STUDY CLUB, INCORPORATED, THE | — | 0052281 | 1951-09-24 | Revoked | |
| BUENA VISTA HOMES, INCORPORATED | — | 0006590 | 1951-04-16 | Dissolved | |
| BULL BROTHERS, INCORPORATED | — | 0006628 | 1951-05-01 | Active | W. SUFFIELD |
| BURVIN AUTOMATIC PRODUCTS,INCORPORATED | — | 0006750 | 1951-03-22 | Dissolved | |
| C & R STEEL COMPANY, INCORPORATED, THE | — | 0007206 | 1951-05-15 | Revoked | |
| CADMIUM PLATING COMPANY, THE | — | 0082151 | 1951-06-29 | Merged | |
| CALABRO CHEESE CORPORATION | — | 0082371 | 1951-09-04 | Active | EAST HAVEN |
| CALVARY CHURCH OF THE CHRISTIAN AND MISSIONARY ALLIANCE | — | 0062878 | 1951-01-08 | Active | |
| CANDLEWOOD TRAILS ASSOCIATION,INCORPORATED,THE | — | 0052386 | 1951-06-25 | Active | New Milford |
| CAROL SHOES, INCORPORATED | — | 0007941 | 1951-12-13 | Revoked | NONE |
| CARROLL, HARRINGTON, BARBER POST 4908, VETERANS OF FOREIGN WARS OF THE UNITED STATES, INC. | — | 0052322 | 1951-09-04 | Active | |
| CARTER RICE STORRS & BEMENT INCORPORATED | — | 0008062 | 1951-08-09 | Withdrawn | |
| CASPARI, INC. | Information | 0020694 | 1951-01-10 | Active | SEYMOUR |
| CHAMBER OF COMMERCE OF NEW CANAAN, CONNECTICUT, INCORPORATED | — | 0052563 | 1951-11-30 | Active | NEW CANAAN |
| CHANCEY BROTHERS AMUSEMENT COMPANY, THE | — | 0008530 | 1951-05-29 | Dissolved | |
| CHAPEL, INCORPORATED | — | 0008554 | 1951-04-12 | Revoked | |
| CHARLOP AND RODENSKY INCORPORATED | — | 0109384 | 1951-07-05 | Dissolved | |
| CHARTER OAK PHOTOGRAPHIC SOCIETY, INC. | — | 0052588 | 1951-06-07 | Active | Avon |
| CHASBOURNE, INCORPORATED | — | 0242934 | 1951-07-31 | Revoked | |
| CHERRY BROOK GRANGE NO. 210, INCORPORATED THE | — | 0124649 | 1951-03-12 | Dissolved | |
| CHESTER GRANGE NO. 158 INCORPORATED, THE | — | 0052629 | 1951-09-12 | Revoked | NONE |
| CHRIST EVANGELICAL LUTHERAN CHURCH (MIDDLETOWN) | — | 0266178 | 1951-02-06 | Active | |
| CHRIST'S HOLINESS CHURCH, INCORPORATED | — | 0062963 | 1951-04-06 | Active | NONE |
| CHURCH ON THE ROCK OF THE APOSTOLIC FAITH, INCORPORATED, THE | — | 0063037 | 1951-08-13 | Dissolved | |
| CHURCH-UNION REALTY CORPORATION, THE | — | 0009133 | 1951-01-26 | Revoked | NONE |
| CIDONA, INC. | — | 0098598 | 1951-10-23 | Dissolved | NONE |
| CITY POINT CONGREGATION OF JEHOVAH'S WITNESSES, NEW HAVEN, CONNECTICUT, INC. | — | 0064028 | 1951-10-25 | Active | |
| CLIFFORD L. SWAN CO., INCORPORATED | — | 0009417 | 1951-05-02 | Revoked | |
| CLINTON'S INCORPORATED | — | 0009470 | 1951-09-14 | Revoked | |
| COBBS MILL INN, INCORPORATED | — | 0009562 | 1951-11-13 | Revoked | |
| COLEMAN BROTHERS SHOWS, INCORPORATED | — | 0009665 | 1951-01-08 | Active | MIDDLETOWN |