| 1933 |
| June 16 | Blue Ridge Parkway, North Carolina and Virginia (acquired 1936) |
| Aug. 22 | Cedar Breaks NM, Utah |
| 1934 |
| May 30 | Everglades NP, Florida |
| June 14 | Ocmulgee NM, Georgia |
| June 19 | Natchez Trace Parkway, Mississippi, Alabama, and Tennessee (acquired 1938) |
| June 21 | Monocacy NMP, Maryland (reauthorized and redesignated a NB 1976) |
| June 26 | Thomas Jefferson Memorial, District of Columbia (dedicated 1943) |
| 1935 |
| Jan. 4 | Fort Jefferson NM, Florida (redesignated Dry Tortugas NP 1992) |
| June 20 | Big Bend NP, Texas |
| Aug. 21 | Historic Sites Act |
| Aug. 21 | Fort Stanwix NM, New York (acquired 1973) |
| Aug. 27 | Ackia Battleground NM, Mississippi (incorporated in Natchez Trace Parkway 1961) |
| Aug. 29 | Andrew Johnson NM, Tennessee (redesignated a NHS 1963) |
| Dec. 20 | Jefferson National Expansion Memorial,
Missouri (Gateway Arch authorized 1954, dedicated 1968) |
| 1936 |
| March 2 | Richmond NBP, Virginia |
| March 19 | Homestead NM of America, Nebraska |
| May 26 | Fort Frederica NM, Georgia |
| June 2 | Perry's Victory and International Peace
Memorial NM, Ohio (redesignated Perry's Victory and International Peace Memorial
1972) |
| June 23 | Park, Parkway, and Recreation Area Study Act |
| June 29 | Whitman Mission NM, Washington (redesignated a NHS 1963) |
| Aug. 16 | Joshua Tree NM, California (incorporated in Joshua Tree NP 1994) |
| Oct. 13 | Boulder Dam NRA, Nevada and Arizona (redesignated Lake Mead NRA 1947) |
| Nov. 14 | Bull Run Recreational Demonstration Area, Virginia (redesignated Manassas NBP 1940) |
| Nov. 14 | Catoctin Recreational Demonstration Area, Maryland (redesignated Catoctin Mountain Park 1954) |
| Nov. 14 | Chopawamsic Recreational Demonstration Area, Virginia (redesignated Prince William Forest Park 1948) |
| 1937 |
| Jan. 22 | Zion NM, Utah (incorporated in Zion NP 1956) |
| April 13 | Organ Pipe Cactus NM, Arizona |
| Aug. 2 | Capitol Reef NM, Utah (redesignated a NP 1971) |
| Aug. 17 | Cape Hatteras NS, North Carolina |
| Aug. 25 | Pipestone NM, Minnesota |
| 1938 |
| March 17 | Salem Maritime NHS, Massachusetts |
| April 26 | Channel Islands NM, California
(incorporated in Channel Islands NP 1980) |
| June 1 | Saratoga NHP, New York |
| June 29 | Olympic NP, Washington (incorporated Mount Olympus NM) |
| July 16 | Fort Laramie NM, Wyoming (redesignated a NHS 1960) |
| Aug. 3 | Hopewell Village NHS, Pennsylvania (redesignated Hopewell Furnace NHS 1985) |
| Sept. 23 | Chesapeake and Ohio Canal, District of
Columbia, Maryland, and West Virginia (date acquired; designated a NM 1961;
incorporated in Chesapeake and Ohio Canal NHP 1971) |
| 1939 |
| May 17 | Santa Rosa Island NM, Florida (abolished
1946; island included in Gulf Islands NS 1971) |
| May 26 | Federal Hall Memorial NHS, New York (redesignated Federal Hall NMem 1955) |
| May 26 | Philadelphia Custom House NHS, Pennsylvania (incorporated in Independence NHP 1959) |
| July 1 | Mount Rushmore NMem, South Dakota (date acquired) |
| July 25 | Tuzigoot NM, Arizona |
| 1940 |
| March 4 | Kings Canyon NP, California (incorporated General Grant NP) |
| June 11 | Cumberland Gap NHP, Kentucky, Virginia, and Tennessee |
| July 1 | National Cemetery of Custer's Battlefield Reservation,
Montana (date acquired; redesignated Custer Battlefield NM 1946; redesignated
Little Bighorn Battlefield NM 1991) |
| Aug. 12 | Fort Washington Park, Maryland |
| Dec. 18 | Vanderbilt Mansion NHS, New York |
| 1941 |
| April 5 | Fort Raleigh NHS, North Carolina |
| 1943 |
| March 15 | Jackson Hole NM, Wyoming (incorporated in Grand Teton NP 1950) |
| July 14 | George Washington Carver NM, Missouri |
| 1944 |
| Jan. 15 | Home of Franklin D. Roosevelt NHS, New York |
| June 30 | Harpers Ferry NM, West Virginia and Maryland (redesignated a NHP 1963) |
| Oct. 13 | Atlanta Campaign NHS, Georgia (abolished 1950) |
| 1945 |
| May 22 | Millerton Lake Recreation Area, California (abolished 1957) |
| May 22 | Shasta Lake Recreation Area, California (transferred to Forest Service 1948) |
| 1946 |
| April 18 | Lake Texoma Recreation Area, Oklahoma and Texas (transferred to Corps of Engineers 1949) |
| Aug. 12 | Castle Clinton NM, New York |
| Dec. 9 | Adams Mansion NHS, Massachusetts (redesignated Adams NHS 1952; redesignated Adams NHP 1998) |
| Dec. 18 | Coulee Dam NRA, Washington (redesignated Lake Roosevelt NRA 1997) |
| 1947 |
| April 25 | Theodore Roosevelt National Memorial Park, North Dakota (redesignated a NP 1978) |
| 1948 |
| March 11 | DeSoto NMem, Florida |
| April 28 | Fort Sumter NM, South Carolina |
| June 19 | Fort Vancouver NM, Washington (redesignated a NHS 1961) |
| June 22 | Hampton NHS, Maryland |
| June 28 | Independence NHP, Pennsylvania (incorporated Independence Hall NHS, designated 1943) |
| 1949 |
| Feb. 14 | San Juan NHS, Puerto Rico |
| June 8 | Saint Croix Island NM, Maine (redesignated an
International Historic Site 1984) |
| Aug. 17 | Suitland Parkway, Maryland and District of Columbia (date acquired; incorporated in National Capital Parks 1975) |
| Oct. 25 | Effigy Mounds NM, Iowa |
| 1950 |
| Aug. 3 | Baltimore-Washington Parkway, Maryland (date acquired; incorporated in National Capital Parks 1975) |
| Aug. 3 | Greenbelt Park, Maryland |
| Sept. 14 | Grand Teton NP, Wyoming (incorporated 1929 NP and Jackson Hole NM) |
| Sept. 21 | Fort Caroline NMem, Florida |