| Site | State | Type | Population |
|---|---|---|---|
| Lamar County, MS | Mississippi | County | 62693 |
| Lamar, CO | Colorado | City | 7656 |
| Lancaster County, NE | Nebraska | County | 324514 |
| Lancaster County, PA | Pennsylvania | County | 553652 |
| Lancaster County, VA | Virginia | County | 10928 |
| Lancaster, CA | California | City | 157697 |
| Lancaster, OH | Ohio | City | 40763 |
| Lancaster, PA | Pennsylvania | City | 57503 |
| Lancaster, TX | Texas | City | 40728 |
| Lane County, OR | Oregon | County | 383189 |
| Langley, SC | South Carolina | City | 2179 |
| Lanham, MD | Maryland | City | 11054 |
| Lansing, IL | Illinois | City | 27614 |
| Lansing, MI | Michigan | City | 112684 |
| Lantana, FL | Florida | City | 12030 |
| Laredo, TX | Texas | City | 256153 |
| Largo, FL | Florida | City | 82340 |
| Largo, MD | Maryland | City | 11633 |
| Larimer County, CO | Colorado | County | 359066 |
| Las Cruces, NM | New Mexico | City | 112914 |
| Las Vegas, NV | Nevada | City | 646970 |
| LaSalle County, IL | Illinois | County | 108965 |
| Lathrop, CA | California | City | 30659 |
| Latrobe, PA | Pennsylvania | City | 7983 |
| Lauderdale County, AL | Alabama | County | 92870 |
| Lauderhill, FL | Florida | City | 74482 |
| Laurel County, KY | Kentucky | County | 60631 |
| Laurel, MD | Maryland | City | 25735 |
| Laurens County, SC | South Carolina | County | 67803 |
| Laurens, SC | South Carolina | City | 9319 |
| Lawrence County, PA | Pennsylvania | County | 86070 |
| Lawrence Township, NJ | New Jersey | City | 32668 |
| Lawrence, MA | Massachusetts | City | 80022 |
| Lawton, OK | Oklahoma | City | 91055 |
| Layton, UT | Utah | City | 77268 |
| Lead, SD | South Dakota | City | 2971 |
| Leadville, CO | Colorado | City | 2731 |
| League City, TX | Texas | City | 115595 |
| Lealman, FL | Florida | City | 21636 |
| Leavenworth, IN | Indiana | City | 253 |
| Lebanon, NH | New Hampshire | City | 13718 |
| Lebanon, OR | Oregon | City | 18945 |
| Lebanon, TN | Tennessee | City | 38431 |
| Lee County, FL | Florida | County | 787976 |
| Lee’s Summit, MO | Missouri | City | 101108 |
| Leesburg, FL | Florida | City | 23142 |
| Lehi, UT | Utah | City | 64006 |
| Lehigh County, PA | Pennsylvania | County | 375539 |
| Lehighton, PA | Pennsylvania | City | 5305 |
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