| Penobscot | 150,000 | Bangor | Maine | Portland-Bangor, ME | View → |
| Peoria | 185,000 | Peoria | Illinois | Champaign-Peoria, IL | View → |
| Pepin | 7,400 | Durand | Wisconsin | Minneapolis-St. Paul, MN | View → |
| Perkins | 2,900 | Lemmon | South Dakota | Bismarck, ND | View → |
| Perkins | 3,000 | Grant | Nebraska | Lincoln, NE | View → |
| Perquimans | 14,000 | Hertford | North Carolina | Norfolk, VA-Salisbury, MD | View → |
| Perry | 36,000 | New Lexington | Ohio | Columbus, OH | View → |
| Perry | 46,200 | Newport | Pennsylvania | Harrisburg, PA | View → |
| Perry | 26,500 | Hazard | Kentucky | Lexington-Bowling Green, KY | View → |
| Perry | 10,000 | Perryville | Arkansas | Little Rock, AR | View → |
| Perry | 19,500 | Tell City | Indiana | Louisville, KY-Evansville, IN | View → |
| Perry | 12,000 | New Augusta | Mississippi | Mobile, AL-Panama City, FL | View → |
| Perry | 8,600 | Marion | Alabama | Montgomery-Dothan, AL | View → |
| Perry | 8,100 | Linden | Tennessee | Nashville, TN | View → |
| Perry | 22,000 | Du Quoin | Illinois | Paducah, KY | View → |
| Perry | 19,000 | Perryville | Missouri | Paducah, KY | View → |
| Pershing | 7,150 | Lovelock | Nevada | Las Vegas-Reno, NV | View → |
| Person | 40,000 | Roxboro | North Carolina | Raleigh-Greenville-Wilmington, NC | View → |
| Petersburg City | 31,000 | Petersburg | Virginia | Richmond, VA | View → |
| Petroleum | 500 | Winnett | Montana | Missoula-Billings-Butte, MT | View → |
| Pettis | 42,000 | Sedalia | Missouri | Kansas City, MO | View → |
| Phelps | 9,100 | Holdrege | Nebraska | Lincoln, NE | View → |
| Phelps | 45,000 | Rolla | Missouri | Springfield, MO | View → |
| Philadelphia | 1,625,000 | Philadelphia | Pennsylvania | Philadelphia, PA | View → |
| Phillips | 4,500 | Holyoke | Colorado | Denver-Colorado Springs, CO | View → |
| Phillips | 5,200 | Phillipsburg | Kansas | Lincoln, NE | View → |
| Phillips | 16,000 | Helena-West Helena | Arkansas | Memphis, TN | View → |
| Phillips | 3,900 | Malta | Montana | Missoula-Billings-Butte, MT | View → |
| Piatt | 16,000 | Monticello | Illinois | Champaign-Peoria, IL | View → |
| Pickaway | 59,000 | Circleville | Ohio | Columbus, OH | View → |
| Pickens | 34,000 | Jasper | Georgia | Atlanta, GA | View → |
| Pickens | 19,200 | Carrollton | Alabama | Birmingham-Huntsville, AL | View → |
| Pickens | 130,000 | Easley | South Carolina | Greenville, SC-Asheville, NC | View → |
| Pickett | 5,200 | Byrdstown | Tennessee | Nashville, TN | View → |
| Pierce | 4,000 | Rugby | North Dakota | Bismarck, ND | View → |
| Pierce | 19,500 | Blackshear | Georgia | Jacksonville-Tallahassee, FL | View → |
| Pierce | 42,000 | River Falls | Wisconsin | Minneapolis-St. Paul, MN | View → |
| Pierce | 7,200 | Pierce | Nebraska | Omaha, NE-Sioux City, IA | View → |
| Pierce | 925,000 | Tacoma | Washington | Seattle, WA | View → |
| Pike | 19,000 | Zebulon | Georgia | Atlanta, GA | View → |
| Pike | 15,000 | Pittsfield | Illinois | Champaign-Peoria, IL | View → |
| Pike | 56,000 | Pikeville | Kentucky | Charleston-Bluefield, WV | View → |
| Pike | 28,000 | Waverly | Ohio | Columbus, OH | View → |
| Pike | 40,000 | McComb | Mississippi | Jackson, MS | View → |
| Pike | 10,000 | Murfreesboro | Arkansas | Little Rock, AR | View → |
| Pike | 12,300 | Petersburg | Indiana | Louisville, KY-Evansville, IN | View → |
| Pike | 33,800 | Troy | Alabama | Montgomery-Dothan, AL | View → |
| Pike | 57,200 | Milford | Pennsylvania | New York, NY | View → |
| Pike | 18,500 | Bowling Green | Missouri | St. Louis, MO | View → |
| Pima | 1,063,200 | Tucson | Arizona | Phoenix-Tuscon, AZ | View → |
