The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 0-2-2 (3 members)
- 0-4-0 (69 members)
- 0-4-2 (29 members)
- 0-4-4 (4 members)
- 0-4-4-0 (3 members)
- 0-6-0 (82 members)
- 0-6-2 (6 members)
- 0-8-0 (8 members)
- 0-8-2 (5 members)
- 1900s (5 members)
- 1940 (1 member)
- 1940s (46 members)
- 1945 (24 members)
- 1946 (11 members)
- 1947 (1 member)
- 1948 (8 members)
- 1949 (18 members)
- 1950 (18 members)
- 1950s (80 members)
- 1951 (6 members)
- 1952 (17 members)
- 1953 (8 members)
- 1954 (11 members)
- 1955 (15 members)
- 1956 (10 members)
- 1956 births (1 member)
- 1957 (12 members)
- 1958 (9 members)
- 1959 (11 members)
- 1960 (6 members)
- 1960s (105 members)
- 1961 (8 members)
- 1962 (5 members)
- 1963 (12 members)
- 1964 (17 members)
- 1965 (14 members)
- 1966 (20 members)
- 1967 (31 members)
- 1968 (18 members)
- 1969 (8 members)
- 1970 (5 members)
- 1970s (56 members)
- 1971 (4 members)
- 1972 (16 members)
- 1973 (6 members)
- 1974 (10 members)
- 1975 (1 member)
- 1976 (6 members)
- 1977 (1 member)
- 1978 (0 members)