| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Black Hill | city | Maryland | United States | 39.19 | -77.30 | 364 | |
| Black Oak | city | Maryland | United States | 39.50 | -78.92 | 830 | |
| Blackberry Hills | city | Maryland | United States | 39.70 | -77.36 | 830 | |
| Blackburn Village | city | Maryland | United States | 39.11 | -76.93 | 400 | |
| Blackhorse | city | Maryland | United States | 39.62 | -76.55 | 830 | |
| Blackrock Estates | city | Maryland | United States | 39.14 | -77.30 | 347 | |
| Blackrock Hills | city | Maryland | United States | 39.15 | -77.30 | 347 | |
| Blackrock Mill | city | Maryland | United States | 39.13 | -77.31 | 360 | |
| Blacks Corner | city | Maryland | United States | 39.71 | -77.10 | 830 | |
| Blacks Glen | city | Maryland | United States | 39.52 | -77.59 | 830 | |
| Blackwalnut Cove | city | Maryland | United States | 38.94 | -76.48 | 3 | |
| Blackwater | city | Maryland | United States | 38.39 | -76.14 | 3 | |
| Bladen | city | Maryland | United States | 39.00 | -76.64 | 98 | |
| Bladensburg | city | Maryland | United States | 38.94 | -76.93 | 62 | |
| Blair Portal | city | Maryland | United States | 38.99 | -77.04 | 331 | |
| Blair Woods | city | Maryland | United States | 38.92 | -76.17 | 3 | |
| Blairtown (historical) | city | Maryland | United States | 38.76 | -75.90 | 49 | |
| Blake | city | Maryland | United States | 39.72 | -75.92 | 396 | |
| Blakeford | city | Maryland | United States | 39.01 | -76.16 | 3 | |
| Blakistone | city | Maryland | United States | 38.28 | -76.80 | 16 | |
| Blandford Village | city | Maryland | United States | 38.72 | -76.89 | 200 | |
| Blank | city | Maryland | United States | 39.53 | -77.59 | 987 | |
| Blankner Hill | city | Maryland | United States | 39.41 | -77.02 | 830 | |
| Blenheim | city | Maryland | United States | 39.49 | -76.55 | 830 | |
| Blenheim Forest | city | Maryland | United States | 39.50 | -76.55 | 830 | |
| Blenheim Manor | city | Maryland | United States | 39.49 | -76.56 | 830 | |
| Blocktown | city | Maryland | United States | 39.20 | -77.33 | 830 | |
| Bloom | city | Maryland | United States | 39.48 | -77.03 | 830 | |
| Bloomery | city | Maryland | United States | 38.77 | -75.73 | 26 | |
| Bloomfield | city | Maryland | United States | 38.78 | -76.11 | 3 | |
| Bloomfield | city | Maryland | United States | 39.48 | -77.42 | 344 | |
| Bloomfield Manor | city | Maryland | United States | 39.37 | -76.99 | 830 | |
| Blooming Rose | city | Maryland | United States | 39.66 | -79.44 | 2017 | |
| Bloomingdale | city | Maryland | United States | 38.97 | -76.12 | 49 | |
| Bloomington | city | Maryland | United States | 39.48 | -79.07 | 1122 | |
| Bloomsbury | city | Maryland | United States | 39.26 | -76.73 | 410 | |
| Bloomsbury Square | city | Maryland | United States | 38.98 | -76.49 | 3 | |
| Blossom Hills | city | Maryland | United States | 39.13 | -76.52 | 95 | |
| Blount Commons | city | Maryland | United States | 39.19 | -77.23 | 347 | |
| Blue Ball Village | city | Maryland | United States | 39.70 | -75.94 | 390 | |
| Blue Dolphin Estates | city | Maryland | United States | 38.47 | -76.56 | 98 | |
| Blue Grass Manor | city | Maryland | United States | 39.57 | -76.86 | 830 | |
| Blue Hill | city | Maryland | United States | 39.70 | -78.19 | 830 | |
| Blue Mount | city | Maryland | United States | 39.60 | -76.62 | 830 | |
| Blue Mountain | city | Maryland | United States | 39.60 | -77.42 | 830 | |
| Blue Mountain | city | Maryland | United States | 39.71 | -77.53 | 954 | |
| Blue Ridge View | city | Maryland | United States | 39.58 | -77.01 | 830 | |
| Blue Ridge at Crofton Meadows | city | Maryland | United States | 39.01 | -76.67 | 147 | |
| Blueball | city | Maryland | United States | 39.70 | -75.93 | 390 | |
| Blueberry Heights | city | Maryland | United States | 39.65 | -77.57 | 1161 | |
| Blueberry Hill | city | Maryland | United States | 38.23 | -75.57 | 26 | |
| Bluegrass Estates | city | Maryland | United States | 39.70 | -77.62 | 830 | |
| Bluegrass Heights | city | Maryland | United States | 39.32 | -76.52 | 68 | |
| Bluestone Estates | city | Maryland | United States | 38.17 | -76.41 | 3 | |
| Bluff Point | city | Maryland | United States | 39.08 | -76.58 | 3 | |
| Bluff Woods | city | Maryland | United States | 38.26 | -76.72 | 0 | |
| Blythedale | city | Maryland | United States | 39.59 | -76.06 | 272 |