| I'M Alone Fishing Inc (Footer, James) | 175160 | Pamet | 48 | 906915 | B1 |
| I'M Alone Fishing Inc (Footer, James) | 164288 | Not Named - (Footer) | 20 | MS3627JF | B1 |
| I, Kimsarath | 184656 | The Reel Gangsters | 21 | MS9342BS | B1 |
| Iacono, Alex G | 5515 | Storm Elizabeth | 25 | 996881 | CL |
| Iacono, Annabella | 181949 | Nicolos | 21 | MS0608BL | SL |
| Iacono, George L | 178377 | Painkiller | 39 | 1337819 | B1 |
| Iacono, Greg W | 182800 | Nicolos | 21 | MS0608BL | B1 |
| Iacono, Greg W | 180494 | Elevation | 31 | 1302959 | B1 |
| Iacono, Louis G | 179189 | Nicolos | 21 | MS0608BL | SL |
| Iacono, Wayne V | 4102 | Freedom | 35 | 637850 | CL |
| Iacono, Wayne V Jr. | 186914 | | | | EO |
| Iacono, Wayne V Jr. | 186079 | | | | IN |
| Ichabod Flat Oysters (Wilkinson, Donald) | 17256 | Bora Pervane | 24 | MS2179BJ | CL |
| Ierardi, David A | 175422 | Hailey Lynne | 26 | MS7184ZG | B1 |
| Igler, Keith A | 168258 | Not Named - (Igler) | 24 | MS5627BB | B1 |
| Iliades, Constantine N | 179277 | No Name(Iliades) | 17 | MS6326BL | B1 |
| Ilkovich, William J | 163802 | Blue Bandit | 26 | MS6403JF | B1 |
| Inacio, Michael J | 1910 | Leanna | 36 | MS4380AH | CL |
| Incentive Fisheries, Llc (Quinn, Charles M Jr.) | 158699 | Incentive | 80 | 691158 | B2 |
| Incutto, Donald J | 141596 | Hey Coach | 23 | MS2569AT | B1 |
| Incutto, Francis T | 138956 | Hey Coach | 23 | MS2569AT | B1 |
| Incutto, Michael J | 153456 | Straight Out | 22 | MS7523MM | B1 |
| Indian Cove Aquaculture Of Wareham Llc (Besse, Dale A) | 135171 | | | | SS |
| Indian Neck Sea Farms Inc (Mindrebo, Carol A) | 184954 | | | | SS |
| Indian Neck Sea Farms Inc (Mindrebo, Todd E) | 162898 | Taylor Morgan | 21 | MS1286AF | SR |
| Indian Neck Selects (Crosen, Peter W) | 138153 | | | | SR |
| Indyck, Stanley J Iii | 101974 | Not Named - (Indyck) | 16 | MS4791AX | B1 |
| Ingalls, John P | 138692 | Back To Get Ya | 23 | MS9536AN | B1 |
| Ingalls, Rebecca L | 182100 | | | | SS |
| Ingham, Bruce W | 69166 | Ocean Rancher | 44 | 595889 | B1 |
| Inman, Brian F | 183373 | Form Dawg | 24 | MS2400CC | RR |
| Inshore & Offshore Charters, Inc (Lundvall, Eric) | 180572 | Rayna & Kerstin | 51 | RI3975X | ON |
| Integrity Fishing Corp (Walsh, Michael) | 176253 | American Heritage | 62 | 674546 | ON |
| Interceptor Fishing Llc (Weckesser, Paul) | 179307 | Interceptor | 63 | 1136429 | ON |
| Interrante, Joseph P | 178085 | Pick 6 | 20 | MS8530BN | B1 |
| Intuition Fishing Llc (Heath, Douglas W) | 4842 | Intuition | 42 | 1140704 | CL |
| Iodice, Peter A | 171709 | Not Named - (Iodice) | 24 | MS6627ZG | B1 |
| Iona Seafarm (Kaplan, Bradley R) | 135183 | | | | SS |
| Iovanna, David J | 145590 | Under Pressure | 22 | MS2719BH | B1 |
| Ipswich Bay Lobstering (Allen, Samuel K) | 4139 | Gerty | 35 | MS3579MA | CL |
| Ireson, David A | 177954 | Not Named - (Ireson) | 15 | MS9480BJ | B1 |
| Iria, Alvaro M | 157067 | Sea Scrolls | 28 | MS4520BM | B1 |
| Irish Lady Fvc (Ripa, Christopher J) | 174211 | Thunderhawk | 21 | MS3034AH | B1 |
| Irish Lady Fvc (Ripa, Christopher J) | 4499 | Irish Lady | 32 | 656583 | CL |
| Irish Venture, Inc. (Mullen, Julia) | 120027 | Osprey | 108 | 683328 | OL |
| Irwin, Scott C | 2677 | Retriever | 34 | 1069572 | CL |
| Isaksen Fishing Corporation - F/V Bountiful Ii | 4636 | Bountiful Ii | 105 | 633588 | OL |
| Isaksen Fishing Corporation - F/V Huntress | 141705 | Huntress | 92 | 608540 | OL |
| Isherwood, James W | 113455 | | | | RR |
| Island Creek Shellfish Farm (Bennett, William A) | 100466 | | | | IN |
| Island Imports Ltd (Brush, Whitney L) | 185507 | | | | RR |
| Island Oysters (Raith, Mcclain F) | 180825 | | | | IN |
| Italian Princess Inc | 174175 | Italian Princess | 92 | 937287 | B2 |
| Italian Princess Inc (Alexander, Warren) | 178474 | Italian Princess | 79 | 678575 | ON |
| Ives, Benjamin P | 918 | Lady Lisa S Ii | 15 | MS0656BP | CL |
| Ivo, Jaime I | 170160 | Robalo | 26 | MS6711JR | B1 |
| Iwic, Peter J | 178548 | | | | IN |