| 101 | 8, Church StreetCO12 3DP | Grade II |
| 102 | 8, King's Quay StreetCO12 3HA | Grade II |
| 103 | 9, 10, 11, 11a and 12 Castlegate StreetCO12 3HA | Grade II |
| 104 | 9, King's Quay StreetCO12 3EU | Grade II |
| 105 | 9, Market StreetCO12 3DY | Grade II |
| 106 | 9, West StreetCO12 3NG | Grade II |
| 107 | Alma Inn (Part)CO12 3EE | Grade II |
| 108 | Alma Inn (Part)CO12 3EZ | Grade II |
| 109 | Angelgate Cottages (Terrace)CO12 3EJ | Grade II |
| 110 | Angel Public HouseCO12 3HB | Grade II |
| 111 | Antique ShopCO12 3EX | Grade II |
| 112 | Barton MarineCO12 3NG | Grade II |
| 113 | Bollard Path Adjacent to Three CupsCO12 3DP | Grade II |
| 114 | Bollards 20 Metres North of North East Corner of Church of St NicholasCO12 3DT | Grade II |
| 115 | Bollards 20 Metres South East of South East Corner of Church of St NicholasCO12 3DT | Grade II |
| 116 | Drinking FountainCO12 3LZ | Grade II |
| 117 | Esplanade CottageCO12 3ES | Grade II |
| 118 | Esplanade House and Attached RailingsCO12 3ES | Grade II |
| 119 | Former Harbour CafeCO12 3DG | Grade II |
| 120 | Former the Wellington InnCO12 3DY | Grade II |
| 121 | ForrestersCO12 3DR | Grade II |
| 122 | Gate Piers 20 Metres South East of South East Corner of Church of St NicholasCO12 3DT | Grade II |
| 123 | Government House Flats and Boundary WallsCO12 3DL | Grade II |
| 124 | Harbour CottageCO12 3ED | Grade II |
| 125 | Harwich Train Ferry BerthCO12 3JW | Grade II |
| 126 | Low LighthouseCO12 3NJ | Grade II |
| 127 | Naval HouseCO12 3JJ | Grade II |
| 128 | Neptune CottageCO12 3ES | Grade II |
| 129 | Number 7 and Ancient Wall at RearCO12 3DY | Grade II |
| 130 | Old Customs HouseCO12 3DG | Grade II |
| 131 | Old Harbour AntiquesCO12 3DX | Grade II |
| 132 | Pier HotelCO12 3HH | Grade II |
| 133 | Premises of Orwell and Harwich Navigation CompanyCO12 3HH | Grade II |
| 134 | Quayside Court Including Lamp Standards Flanking EntranceCO12 3HH | Grade II |
| 135 | Railings to Churchyard of St Nicholas Brick Piers and ArchCO12 3DR | Grade II |
| 136 | Railings to Former GraveyardCO12 3DP | Grade II |
| 137 | School HouseCO12 3ER | Grade II |
| 138 | The Billy Public HouseCO12 3DB | Grade II |
| 139 | The British Flag Public HouseCO12 3NE | Grade II |
| 140 | The Globe Public HouseCO12 3HB | Grade II |
| 141 | The RowesCO12 3DB | Grade II |
| 142 | The Ship RestaurantCO12 3HB | Grade II |
| 143 | The Smugglers RestaurantCO12 3ND | Grade II |
| 144 | The Three Cups Public HouseCO12 3DS | Grade II |
| 145 | Trinity CottageCO12 3DQ | Grade II |
| 146 | Trinity House OfficesCO12 3NF | Grade II |
| 147 | Walled Enclosure North of Church of St Nicholas Incorporating Churchyard WallCO12 3EG | Grade II |
| 148 | Wellington HouseCO12 3DJ | Grade II |