There are currently 373 alumni listings for Waterloo High School broken up into 58 classes as follows:
Choose a Waterloo High School class to view its listings:
1937,
1945,
1946,
1948,
1949,
1950,
1952,
1953,
1954,
1955,
1956,
1957,
1959,
1960,
1961,
1962,
1963,
1964,
1966,
1967,
1968,
1969,
1970,
1971,
1972,
1973,
1974,
1975,
1976,
1977,
1978,
1979,
1980,
1981,
1982,
1983,
1984,
1985,
1986,
1987,
1988,
1989,
1990,
1991,
1992,
1993,
1994,
1995,
1996,
1997,
1998,
1999,
2000,
2001,
2002,
2003,
2005,
2006,
