| | | St. Clair County | MI | 26147 | Warren-Troy-Farmington
Hills, MI 47664 | Detroit-Warren-Dearborn,
MI 19820 | Detroit-Warren-Ann Arbor,
MI 220 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=St.ClairCounty+MI |
| | | District of Columbia | DC | 11001 | Washington, DC-MD 47764 | Washington-Arlington-Alexandria,
DC-VA-MD-WV 47900 | Washington-Baltimore-Arlington,
DC-MD-VA-WV-PA 548 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=DistrictofColumbia+DC |
| | | Charles County | MD | 24017 | Washington, DC-MD 47764 | Washington-Arlington-Alexandria,
DC-VA-MD-WV 47900 | Washington-Baltimore-Arlington,
DC-MD-VA-WV-PA 548 | Outlying | metro county (urban) | nonspecialized | https://maps.google.com/?q=CharlesCounty+MD |
| | | Prince George's
County | MD | 24033 | Washington, DC-MD 47764 | Washington-Arlington-Alexandria,
DC-VA-MD-WV 47900 | Washington-Baltimore-Arlington,
DC-MD-VA-WV-PA 548 | Central | metro county (urban) | federal/state
government-dependent | https://maps.google.com/?q=PrinceGeorge'sCounty+MD |
| | | Palm Beach County | FL | 12099 | West Palm Beach-Boca
Raton-Delray Beach, FL 48424 | Miami-Fort
Lauderdale-West Palm
Beach, FL 33100 | Miami-Port St. Lucie-Fort
Lauderdale, FL 370 | Central | metro county (urban) | recreation | https://maps.google.com/?q=PalmBeachCounty+FL |
| | | New Castle County | DE | 10003 | Wilmington, DE-MD-NJ 48864 | Philadelphia-Camden-Wilmington,
PA-NJ-DE-MD 37980 | Philadelphia-Reading-Camden,
PA-NJ-DE-MD 428 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=NewCastleCounty+DE |
| | | Cecil County | MD | 24015 | Wilmington, DE-MD-NJ 48864 | Philadelphia-Camden-Wilmington,
PA-NJ-DE-MD 37980 | Philadelphia-Reading-Camden,
PA-NJ-DE-MD 428 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=CecilCounty+MD |
| | | Salem County | NJ | 34033 | Wilmington, DE-MD-NJ 48864 | Philadelphia-Camden-Wilmington,
PA-NJ-DE-MD 37980 | Philadelphia-Reading-Camden,
PA-NJ-DE-MD 428 | Central | metro county (urban) | nonspecialized | https://maps.google.com/?q=SalemCounty+NJ |