| Name | What | Region | Country | Lat | Long | Elev Ft. | Pop Est |
|---|
| Lake Pocotopaug | city | Connecticut | United States | 41.59278 | -72.51139 | 456 | 11799 |
| Lake Pocotopaug | city | Connecticut | United States | 41.59833 | -72.51083 | 456 | 11799 |
| Lake View | city | Connecticut | United States | 41.35611 | -72.51194 | 298 | 13474 |
| Lake View Terrace | city | Connecticut | United States | 41.94694 | -72.36722 | 770 | 11595 |
| Lakeridge Heights | city | Connecticut | United States | 41.52194 | -72.63556 | 95 | 35205 |
| Lakeside | city | Connecticut | United States | 41.68222 | -73.23778 | 898 | 5754 |
| Lakeside | city | Connecticut | United States | 41.43306 | -73.22667 | 200 | 16894 |
| Lakeside Woods | city | Connecticut | United States | 41.56583 | -73.49167 | 469 | 11575 |
| Lakeville | city | Connecticut | United States | 41.96444 | -73.44056 | 757 | 2921 |
| Lakewood | city | Connecticut | United States | 41.57972 | -73.03028 | 498 | 114766 |
| Lamson Corner | city | Connecticut | United States | 41.7425 | -72.97167 | 698 | 28696 |
| Lanesville | city | Connecticut | United States | 41.53556 | -73.42333 | 255 | 19037 |
| Lattins Landing | city | Connecticut | United States | 41.44917 | -73.42944 | 479 | 63267 |
| Laurel Beach | city | Connecticut | United States | 41.18278 | -73.09417 | 0 | 78993 |
| Laurel Glen | city | Connecticut | United States | 41.47222 | -71.81528 | 167 | 4818 |
| Laysville | city | Connecticut | United States | 41.34861 | -72.29889 | 91 | 8607 |
| Lebanon | city | Connecticut | United States | 41.63611 | -72.21306 | 396 | 7357 |
| Ledyard Center | city | Connecticut | United States | 41.43972 | -72.01472 | 298 | 18764 |
| Leesville | city | Connecticut | United States | 41.51167 | -72.48167 | 114 | 7875 |
| Leetes Island | city | Connecticut | United States | 41.26528 | -72.71472 | 39 | 17363 |
| Leffingwell historical | city | Connecticut | United States | 41.50583 | -72.14222 | 98 | 18912 |
| Liberia historical | city | Connecticut | United States | 41.30667 | -72.91056 | 13 | 168862 |
| Liberty Hill | city | Connecticut | United States | 41.66556 | -72.25528 | 456 | 6429 |
| Liberty Mobile Home Park | city | Connecticut | United States | 41.67833 | -72.84889 | 190 | 73177 |
| Lime Rock | city | Connecticut | United States | 41.93361 | -73.38972 | 600 | 2414 |
| Litchfield | city | Connecticut | United States | 41.74722 | -73.18917 | 1079 | 7360 |
| Little City | city | Connecticut | United States | 41.4475 | -72.60056 | 577 | 8094 |
| Little Danbury | city | Connecticut | United States | 41.12889 | -73.24389 | 0 | 110738 |
| Little Danbury historical | city | Connecticut | United States | 41.1275 | -73.24778 | 0 | 110738 |
| Little Haddam | city | Connecticut | United States | 41.48083 | -72.44639 | 360 | 6068 |
| Lonetown | city | Connecticut | United States | 41.32167 | -73.38194 | 682 | 16911 |
| Long HIll Estates subdivision | city | Connecticut | United States | 41.53833 | -72.67639 | 196 | 30907 |
| Long Hill | city | Connecticut | United States | 41.26556 | -73.22472 | 416 | 61175 |
| Long Hill | city | Connecticut | United States | 41.56556 | -73.02333 | 570 | 114766 |
| Long Hill | city | Connecticut | United States | 41.53111 | -72.66028 | 154 | 35205 |
| Long Hill | city | Connecticut | United States | 41.35389 | -72.05278 | 68 | 60927 |
| Long Ridge | city | Connecticut | United States | 41.15556 | -73.59667 | 442 | 23960 |
| Lord Corner historical | city | Connecticut | United States | 41.35778 | -72.54861 | 305 | 11932 |
| Lords Point | city | Connecticut | United States | 41.33583 | -71.9275 | 0 | 13870 |
| Lordship | city | Connecticut | United States | 41.15389 | -73.1125 | 0 | 36462 |
| Lovely Street | city | Connecticut | United States | 41.78278 | -72.89278 | 246 | 32387 |
| Lower City | city | Connecticut | United States | 41.92472 | -73.27667 | 898 | 1789 |
| Lower Merryall | city | Connecticut | United States | 41.64667 | -73.41611 | 515 | 11178 |
| Lydallville | city | Connecticut | United States | 41.79528 | -72.49083 | 396 | 58402 |
| Lyme Station | city | Connecticut | United States | 41.30167 | -72.32722 | 49 | 10227 |
| Lyons Plain | city | Connecticut | United States | 41.225 | -73.34667 | 141 | 19500 |
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