The Maryland Historical Trust serves as the central historic preservation office in Maryland. The properties listed reside within the boundaries of modern Howard County. Prior to 1851, sites would have been part of Anne Arundel County. Sites settled prior to 1650 would have been part of St Mary's County in the Province of Maryland which was settled in 1632 by Europeans.
Maryland Historical Trust properties in Howard County
HO-1, Cherry Grove, 2937 Jennings Chapel Road, Woodbine
HO-2, Oakdale, 16449 Edwin Warfield Road, Woodbine
HO-3, Pleasant Valley (Lost by Neglect), 13893 Forsythe Road, Cooksville
HO-4, Red House Tavern, Hoods Mill Road (MD 97), Cooksville
HO-5, Roberts Inn, 14610 Frederick Road (MD 144), Cooksville
HO-6, Ellerslie, 2761 Roxbury Mills Road (MD 97), Cooksville
HO-7, Union Chapel (St. Andrew's Episcopal Church), Roxbury Mills Road (MD 97), Glenwood HO-8, Longwood (The Dependency), 3188 Roxbury Mills Road (MD 97), Glenwood HO-9, Round About Hills (Peacefields), 15505 Cattail Oaks, Glenwood HO-10, Villa de Speranza (New Year's Gift), 3890 Roxbury Mills Road (MD 97), Glenwood HO-11, Duvall's Range (Stephen Boone Dorsey House), 15451 Roxbury Road, Glenwood HO-12, Roxbury Mill, Roxbury Mill Road, Brookeville HO-13, Howard Lodge (Taylor's Park), 12301 Howard Lodge Drive, Sykesville HO-14, Howard County Hunt Club, 13402 Triadelphia Road, Ellicott City HO-15, Glenelg Manor (Glenelg Country School), 12793 Folly Quarter Road, Glenelg HO-16, Folly Quarter Manor (McTavish House, Carrollton Hall), 12290 Folly Quarter Road, Ellicott City HO-17, Folly Quarter Farm (and Bath House), 4308 Folly Quarter Road, Ellicott City HO-18, Walnut Grove, 5192 Sheppard Lane, Clarksville HO-19, Huntington Farms, 13180 Brighton Dam Road, Clarksville HO-20, Hickory Ridge, 13032 Highland Road, Clarksville
HO-21, Waverley, 2335 Waverly Mansion Drive, Marriotsville
HO-22, Doughoregan Manor (Charles Carroll III of Carrollton House), 3500 Old Manor Lane, Ellicott City HO-23, Burleigh Manor and Gate House (Burleigh Cottage), 3950 White Rose Way, Ellicott City HO-24, Font Hill, 3838 Parrot Drive, Ellicott City HO-25, Brick House on the Pike (Brick House Farm, Ellerslie), 9564 National Pike (US 40), Ellicott City HO-26, St. John's Episcopal Church, 9130 Frederick Road (MD 144), Ellicott City HO-27, Daniels Mill (Elysville, Gary, Alberton Mill), Daniels Road, Ellicott HO-28, Dorsey Hall, 5100 Dorsey Hall Drive, Ellicott City HO-29, Arlington (Fairway Hills Golf Club), 5100 Columbia Road, Columbia HO-30, Woodlawn, Bendix Road (Formerly 9254 Old Annapolis Road, Columbia HO-31, Spring Hill and Quarters, 4659 Montgomery Road (MD 103) Also 4614 New Cut Road, Ellicott City HO-32, Oakland Manor, 5430 Vantage Point Road, Columbia Maryland HO-33, Blandair, 6651 Little Patuxent Parkway (MD 175), Columbia HO-34, Waveland, Sewells Orchard Drive, Columbia HO-35, Christ Church (Queen Caroline Parish Church), 6800 Oakland Mills Road, Columbia HO-36, Oak Hall Site, Oak Hall Lane, Columbia HO-37, Athol, 6680 Columbia Pike (US 29), Columbia HO-38, Montpelier, 10904 Johns Hopkins Road, Laurel HO-39, Worthington's Quarters (White Hall, Iris Hall), Weather Worn Way, Columbia HO-40, Moundland, Guilford Road, Columbia HO-41, Commodore Joshua Barney House (Harry's Lott), 7912 Savage Guilford Road, Jessup HO-42, Savage Mill Historic District, Savage HO-43, Belmont (Moore's Morning Choice), 6555 Belmont Woods Road, Elkridge HO-44, Troy Hill (Troy), Baltimore Washington Boulevard (US 1), Elkridge HO-45, Trinity Church, 7474 Baltimore Washington Boulevard (US 1), Elkridge HO-46, Spurriers Tavern, site, Waterloo Road (MD 175) & Baltimore Washington Boulebard (US 1), Jessup HO-47, Temora, 4252 Columbia Road, Ellicott City HO-48, Woodlawn (Le Papillon), 8880 Frederick Road, Ellicott City HO-49, Mount Hebron, 2331 Calvin Circle, Ellicott City HO-50, First Presbyterian Church (Howard County Historical Society Building), 8328 Court Avenue, Ellicott City