| County | Average Income |
| Montgomery |  $48,690 |
| Howard | $47,662 |
| Anne Arundel | $40,323 |
| Talbot | $37,767 |
| Calvert | $37,641 |
| Charles | $37,157 |
| Queen Anne's | $36,526 |
| Frederick | $36,472 |
| St. Mary's | $35,546 |
| Carroll | $35,242 |
| Harford | $34,953 |
| Baltimore | $34,447 |
| Worcester | $32,704 |
| Kent | $32,579 |
| Prince George's | $32,254 |
| Cecil | $29,025 |
| Dorchester | $26,505 |
| Washington | $26,356 |
| Wicomico | $25,417 |
| Caroline | $25,300 |
| Garrett | $24,904 |
| City of Baltimore | $24,155 |
| Allegany | $21,677 |
| Somerset | $17,168 |
US-Places.com
Maryland Income by County -
Average income
The graph below ranks each Maryland County by Average income according to the 2012 census estimates.