Highest and Lowest Elevations in Maryland's Counties
| COUNTY | HIGH (ft.) | APPROXIMATE LOCATION | LOW (ft.) | APPROXIMATE LOCATION | RELIEF (ft.) |
| Allegany | 2895 | Dans Rock | 420 | Potomac River at Sideling Hill Creek | 2475 |
| Anne Arundel | 300 | Fort Meade Rd., 0.25 mi. W of Balt-Wash Pkwy | 0 | Chesapeake Bay | 300 |
| Baltimore City | 480 | NW corner in vicinity of Reisterstown Rd. | 0 | Baltimore Harbor (Patapsco River) | ≥ 480 |
| Baltimore | 966 | Mason-Dixon Line near Stiltz, Pa.,on Middletown Rd | 0 | Chesapeake Bay | 966 |
| Calvert | 168 | Sunderland at jct of Rte. 4 & 262 | 0 | Chesapeake Bay | 168 |
| Caroline | 79 | 3 mi. W of Henderson, N side of Bee Tree Rd. | 0 | Chesapeake Bay | 79 |
| Carroll | ≥ 1120 | 4 mi. NW of Manchester, 0.6 mi. NW of Wentz. | 260 | Patapsco River near Marriottsville | 858 |
| Cecil | 535 | 0.25 mi. S of Rock Springs | 0 | Chesapeake Bay | 535 |
| Charles | 235 | nr Bolton, 4.50 mi. WNW of Waldorf | 0 | Potomac River | 235 |
| Dorchester | 57 | Johnson Road, 2.5 mi. E of Williamsburg | 0 | Chesapeake Bay | 57 |
| Frederick | 1895 | South Mountain, 2 mi. NW of Wolfsville | 200 | Potomac River at Monocacy Creek | 1695 |
| Garrett | 3360 | Hoye Crest on Backbone Mt., on the Md.-W.Va. border 1 | 960 | Potomac River at Bloomington | 2400 |
| Harford | 803 | Slate Ridge, 0.4 mi. E of Whiteford | 0 | Chesapeake Bay | 803 |
| Howard | 873 | 1.5 mi. NW of Long Corner | 20 | Patapsco River | 853 |
| Kent | 102 | 2.25 mi. W of Coleman | 0 | Chesapeake Bay | 102 |
| Montgomery | ≥ 880 | ~0.2 mi. SW of intersection of Penn Shop Rd. and Rte. 27, or 0.45 mi. SW of Parrs Spring | 10 | Potomac River at Little Falls | 835 |
| Prince George's | ≥ 440 | Riding Stable Rd., nr Mont-gomery Co. Line; 1.2 mi. NW of jct. I-95 and Md. Rte. 198 | 0 | Potomac R. at Bryan Pt.; Patuxent R. at Chalk Pt. | 440 |
| Queen Anne's | 87 | 0.5 mi. NW of Starr | 0 | Chesapeake Bay 2 | 87 |
| St. Mary's | 192 | NW corner of county on Oaks Cocksey Rd. ~1 mi. E of Rte. 5 | 0 | Chesapeake Bay | 192 |
| Somerset | 46 | 2 mi. NW of Friendship Ch.on Meadow Bridge Rd. | 0 | Chesapeake Bay | 46 |
| Talbot | 78 | Rte. 328, NE edge of Easton | 0 | Chesapeake Bay | 78 |
| Washington | 2140 | Quirauk Mtn, 1.2 mi.S of Fort Ritchie | 250 | Potomac River at Harpers Ferry | 1890 |
| Wicomico | 73 | 1 mi. W of Waste Gate | 0 | Chesapeake Bay | 73 |
| Worcester | 65 | 1 mi. S of Furnace | 0 | Atlantic Ocean | 65 |
- 1 The highest point in Maryland is Hoye Crest at 3,360 feet above sea level on Backbone Mountain, Garrett County.
- 2 The absolute lowest point in Maryland is a natural depression in the bottom of Chesapeake Bay, often called Bloody Point Hole. It is 174 feet below sea level and is approximately 1 mile west-southwest off the southern tip of Kent Island, Queen Anne's County.
Fact Sheet 1: Compiled by the Maryland
Geological Survey, 2300 St. Paul Street, Baltimore, MD 21218
This electronic version of "Fact Sheet No.1 " was prepared by R.D.
Conkwright, Division of Coastal and Estuarine Geology, Maryland Geological
Survey.