Crater Lake National Park: Administrative History by Harlan D. Unrau and Stephen Mark, 1987
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APPENDIX C15: Crater Lake National Park Annual Visitation
| 1902 | Unavailable | 1952 | 323,410 | |
| 1903 | Unavailable | 1953 | 332,835 | |
| 1904 | Est. 1,500 | 1954 | 370,554 | |
| 1905 | Est. 1,400 | 1955 | 343,839 | |
| 1906 | Est. 1,800 | 1956 | 359,840 | |
| 1907 | Est. 2,600 | 1957 | 330,499 | |
| 1908 | 5,275 | 1958 | 333,893 | |
| 1909 | 4,171 | 1959 | 340,989 | |
| 1910 | Est. 5,000 | 1960 | 330,398 | |
| 1911 | Est. 4,500 | 1961 | 415,567 | |
| 1912 | 5,235 | 1962 | 592,124 | |
| 1913 | 6,253 | 1963 | 475,684 | |
| 1914 | 7,096 | 1964 | 494,057 | |
| 1915 | 11,371 | 1965 | 480,478 | |
| 1916 | 12,265 | 1966 | 552,531 | |
| 1917 | 11,645 | 1967 | 499,357 | |
| 1918 | 13,231 | 1968 | 578,271 | |
| 1919 | 16,645 | 1969 | 544,932 | |
| 1920 | 20,135 | 1970 | 534,962 | |
| 1921 | 28,617 | 1971 | 557,958 | |
| 1922 | 33,011 | 1972 | 594,343 | |
| 1923 | 52,017 | 1973 | 539,708 | |
| 1924 | 64,312 | 1974 | 525,030 | |
| 1924 | 65,018 | 1975 | 427,252 | |
| 1926 | 86,019 | 1976 | 606,636 | |
| 1927 | 82,354 | 1977 | 617,479 | |
| 1928 | 113,323 | 1978 | 580,061 | |
| 1929 | 128,435 | 1979 | 446,397 | |
| 1930 | 157,693 | 1980 | 484,256 | |
| 1931 | 170,284 | 1981 | 536,719 | |
| 1932 | 109,738 | 1982 | 484,283 | |
| 1933 | 96,512 | 1983 | 429,586 | |
| 1934 | 118,699 | 1984 | 499,945 | |
| 1935 | 107,701 | 1985 | 427,927 | |
| 1936 | 180,382 | |||
| 1937 | 202,403 | |||
| 1938 | 190,699 | |||
| 1939 | 225,101 | |||
| 1940 | 252,482 | |||
| 1941 | 273,564 | |||
| 1942 | 100,079 | |||
| 1943 | 28,637 | |||
| 1944 | 42,385 | |||
| 1945 | 77,864* | * 1945 and preceding years are based on travel year ending in September. | ||
| 1946 | 188,794 | |||
| 1947 | 289,681 | |||
| 1948 | 243,533 | |||
| 1949 | 255,610 | |||
| 1950 | 328,041 | |||
| 1951 | 306,668 | |||
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