| HIGHWOOD POST NO. 150, THE AMERICAN LEGION, DEPARTMENT OF CONNECTICUT, INCORPORATED | — | 0055915 | 1949-01-25 | Revoked | |
| HOLY GHOST RUSSIAN ORTHODOX VETERANS OF BRIDGEPORT, CONNECTICUT, INCORPORATED, THE | — | 0055959 | 1949-11-21 | Revoked | |
| HOP HOME PARTIES, INC. | — | 0087622 | 1949-10-26 | Dissolved | |
| HORBAL BROTHERS, INCORPORATED | — | 0022557 | 1949-05-23 | Active | BERLIN |
| HOUSATONIC RIVER POWER SQUADRON, INCORPORATED | — | 0056028 | 1949-04-25 | Revoked | EASTON |
| HOWARD A. MERBLUM, INCORPORATED | — | 0022718 | 1949-06-28 | Dissolved | WEST HARTFORD |
| HUGO A. SIMONELLI POST NO. 3263 VETERANS OF FOREIGN WARS OF THE UNITED STATES, INCORPORATED | — | 0056045 | 1949-11-28 | Active | MYSTIC |
| HUMAN RELATIONS AREA FILES, INCORPORATED | — | 0056050 | 1949-03-03 | Active | NEW HAVEN |
| HUNTINGTON ENTERPRISES, INC. | — | 0082278 | 1949-08-23 | Dissolved | |
| HUNTRESS ELECTRONICS, INC. | — | 0022898 | 1949-06-14 | Dissolved | |
| HUSSEY MANUFACTURING COMPANY, INC. | — | 0022916 | 1949-02-24 | Withdrawn | |
| HYGRADE FOOD PRODUCTS CORPORATION | — | 0080972 | 1949-07-07 | Withdrawn | |
| INDIAN NECK IMPROVEMENT ASSOCIATION, INCORPORATED | — | 0056108 | 1949-08-03 | Revoked | NONE |
| INDUSTRIAL TRUCKS, INCORPORATED | — | 0090280 | 1949-08-05 | Revoked | |
| INGLENOOK PROPERTY OWNERS ASSOCIATION, INCORPORATED, THE | — | 0056116 | 1949-11-01 | Revoked | |
| INTERNATIONAL DETECTIVE SERVICE, INCORPORATED | — | 0023630 | 1949-08-30 | Revoked | NONE |
| IONIC TEMPLE ASSOCIATION INCORPORATED | — | 0056184 | 1949-01-03 | Active | COVENTRY |
| ITALIAN AMERICAN VETERANS ASSOCIATION OF NORWICH CONNECTICUT, INCORPORATED THE | — | 0056220 | 1949-01-27 | Revoked | |
| ITALIAN OLD AGE HOME INCORPORATED, THE | — | 0056237 | 1949-06-01 | Revoked | |
| ITALIAN WOMEN'S CIVIC CLUB, INCORPORATED, THE | — | 0056245 | 1949-03-24 | Dissolved | |
| ITALIAN-AMERICAN CLUB OF CROMWELL INCORPORATED, THE | — | 0056201 | 1949-11-25 | Dissolved | |
| J. H. ROSENBECK, INCORPORATED | — | 0024205 | 1949-09-07 | Dissolved | BRISTOL |
| J.J. SULLIVAN, INCORPORATED | — | 0024265 | 1949-06-30 | Active | GUILFORD |
| JACK PISTRITTO & SONS, INCORPORATED | — | 0024536 | 1949-09-15 | Dissolved | NONE |
| JACKSON CORRUGATED CONTAINER CORPORATION THE | — | 0024565 | 1949-12-19 | Dissolved | |
| JACKSON'S INCORPORATED | — | 0024576 | 1949-07-07 | Revoked | |
| JAMES S. SULLIVAN CABLE COMPANY, INCORPORATED | — | 0024728 | 1949-01-10 | Active | WATERBURY |
| JOHN LEAVITT INCORPORATED | — | 0086345 | 1949-04-06 | Dissolved | |
| JOHN TOM HILL COMMUNITY CLUB, INCORPORATED, THE | — | 0056314 | 1949-05-19 | Active | GLASTONBURY |
| JOS. T. SULLIVAN & SONS REALTY COMPANY THE | — | 0090456 | 1949-09-06 | Revoked | |
| JOSEPH J. CLINTON POST, #399, VETERANS OF FOREIGN WARS OF THE UNITED STATES, INCORPORATED, THE | — | 0056322 | 1949-04-01 | Active | Westport |
| JOSEPH J. SOKOL, INCORPORATED | — | 0025568 | 1949-01-17 | Dissolved | |
| KANTHAL CORPORATION, THE | — | 0025909 | 1949-02-11 | Merged | BETHEL |
| KAPLAN REALTY OF NEW LONDON, INC. | — | 0086833 | 1949-05-06 | Dissolved | NONE |
| KASCAK'S GARAGE, INCORPORATED | — | 0025972 | 1949-01-14 | Dissolved | TRUMBULL |
| KEATOR AND COMPANY, INCORPORATED | — | 0026069 | 1949-12-15 | Dissolved | |
| KEHOW TRIBE BUILDING ASSOCIATION, INCORPORATED | — | 0056393 | 1949-12-29 | Revoked | |
| KEMS INCORPORATED | — | 0005871 | 1949-10-19 | Dissolved | |
| KENT GRANGE NO. 154, PATRONS OF HUSBANDRY, INCORPORATED, THE | — | 0056412 | 1949-04-18 | Dissolved | SOUTH KENT |
| KENT VOLUNTEER FIRE DEPARTMENT, INC., THE | — | 0056411 | 1949-09-08 | Active | KENT |
| KING SCHOOL, INCORPORATED | — | 0214062 | 1949-08-04 | Merged | |
| KIWANIS CLUB OF DARIEN, INCORPORATED | — | 0056468 | 1949-08-22 | Revoked | |
| KIWANIS CLUB OF ENFIELD, INC. | — | 0062210 | 1949-03-29 | Revoked | |
| KIWANIS CLUB OF TORRINGTON, INCORPORATED, THE | — | 0051329 | 1949-03-02 | Revoked | TORRINGTON |
| KNIGHTS OF COLUMBUS BLDG. ASSOCIATION OF WEST HAVEN, INCORPORATED, THE | — | 0056517 | 1949-08-31 | Dissolved | |
| KRAMER FUR COMPANY, INCORPORATED , THE | — | 0026664 | 1949-12-21 | Merged | |
| L. CIERCIELLI & SON, INCORPORATED | — | 0026799 | 1949-09-21 | Dissolved | NONE |
| L. SIEGEL & SONS, INCORPORATED THE | — | 0026953 | 1949-06-30 | Dissolved | |
| LADUBY FLUR-O-LOCK COMPANY, INCORPORATED | — | 0027042 | 1949-04-22 | Dissolved | |
| LAKE GARDA COMMUNITY CHURCH | — | 0063809 | 1949-04-29 | Active | |