Feel free to add and/or correct and I"ll update the list as we go.
Cheers,
Rocks.
1856 - Old Ebbitt Grill (present location since 1983)
1860 - Old Angler's Inn
1904 - Royal Restaurant (present location since 1964)
1906 - Occidental Grill (closed 1972-1986)
1922 - O'Donnell's Seafood (originally "O'Donnell's Sea Grill" at 1207 E Street, present location since 2001)
1923*- Iron Gate Restaurant (closed 2010-2013)
1924 - The Dairy at Turner Hall (U of MD)
1925 - Wagshal's (present location since 1939)
1929 - Cozy Restaurant (Thurmont)
1930 - Mrs. K's Toll House (Mrs. K is Mrs. Kreuzburg)
1931 - Normandie Farm
1933 - Billy Martin's Tavern (Opened the day after prohibition was repealed)
1935 - Steak n' Egg
1935 - Tastee Diner (Bethesda)
1937 - Quarry House Tavern
1937 - Red Fox Inn
1939 - Seibel's (renamed from Seibel's Dairy Bar in 1971)
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1943 - Ernie's Crab House (Alexandria)
1943 - Famous Luigi's
1944 - Florida Avenue Grill
1944 - Shrimp Boat (Benning, present location since 1953)
1945 - Crisfield Seafood
1946 - Payne's (Centreville)
1946 - Tastee Diner (Silver Spring)
1946 - Whitlow's (closed 1989-1995, present location since 1995)
1947 - 29 Diner
1947 - Tune Inn
1947 - Woodside Deli
1948 - Old Europe
1949 - AV Ristorante Italiano (AV is Augusto Vasaio)
1949 - Blackie's
1950 - Trio
1950 - Yorkshire's (Centreville)
1952 - Hershey's Restaurant (Gaithersburg)
1953 - Mama Ayesha's
1954 - L'Auberge Chez Francois (present location since 1976)
1954 - Jerry's Subs and Pizza (Wheaton)
1955 - Ledo Restaurant (Adelphi)
1955 - Roy's Place (present location since 1971)
1955 - Yenching Palace
1957 - Mario's Pizza House
1957 - The Brickskeller
1958 - Ben's Chili Bowl
1958 - Coach Stop (Middleburg)
1958 - Mike's Crab House (Annapolis)
1959 - Jiffy Shoppes (Morningside, MD location)
1959 - Loeb's Perfect New York Deli (present location since 2010)
1959 - Market Inn
1960 - The Monocle
1960 - Vienna Inn
1961 - Bethesda Crab House
1962 - 1789
1962 - F Scott's
1962 - McLean Pizza
1962 - The Tombs
1963 - Clyde's (Georgetown)
1964 - Chez Andrée
1964 - Three Pigs BBQ (McLean)
1964 - Tom Sarris' Orleans House
1965 - Bay 'n Surf (Laurel)
1965 - Chick and Ruth's Delly (Annapolis)
1965 - Taj Majal
1965 - The Virginian
1966 - Alpine
1966 - The Guards
1966 - Japan Inn (present location since 1971)
1967 - Chadwick's
1967 - Childe Harold
1967 - The Hitching Post
1967 - Pizza Bazzano (Springfield)
1968 - The Globe and Laurel (Quantico, moved to Triangle in 1975, moved to Stafford in 2008)
1968 - James McLaughlin's Food Cart (Howard University)
1968 - Roy Rogers (Falls Church)
1968 - Stoney's (present location since 2006)
1969 - Bob & Edith's Diner
1970 - Ristorante Portofino
1971 - The Wharf
1972 - Anthony's (Falls Church)
1972 - Golden Flame
1972 - The Palm (DC)
1972 - Mayaluna
1973 - Anita's (Vienna)
1973 - The Green Tree (Leesburg)
1973 - Marco Polo
1973 - Stained Glass Pub
1973 - Taverna Cretekou
1973 - Vietnam Georgetown
1974 - Cafe La Ruche
1974 - Cantler's (Annapolis)
1974 - The Dubliner (Capitol Hill)
1974 - Far East (present location since 1980s)
1974 - La Bergerie
1974 - Shanghai Garden (Van Ness)
1974 - Wu's Garden
1975 - Armand's Chicago Pizzeria (Tenley Circle)
1975 - Bistro Francais
1975 - Celebrity Delly (Falls Church(?))
1975 - The Cracked Claw at Peter Pan (present location since 1989)
1975 - Duck Chang's
1975 - Essy's Carriage House
1975 - Ruffino's
1976 - Afterwords (at Kramerbooks)
1976 - Booeymonger (Georgetown)
1976 - La Chaumiere
1976 - Gadsby's Tavern
1976 - The Prime Rib
1976 - Sushi-Ko
1976 - Table Talk
1976 - Vace (Cleveland Park)
1977 - Amphora (Vienna)
1977 - Generous George's Positive Pizza Place (Alexandria)
1977 - Geppetto
1977 - Geranio (Alexandria)
1977 - Nizam's
1977 - Tia Queta
1978 - Havabite Eatery (Fairfax)
1978 - King's Court (Leesburg)
1978 - Peking Gourmet Inn
1978 - Pistone's Italian Inn
1978 - Zio's
1979 - 219
1979 - Ice House Cafe (Herndon)
1979 - Lebanese Taverna (North Arlington)
1979 - Matuba (South Arlington)
1979 - Nora












