| School Name | Class | City | State/Prov. | Reunion Date |
|---|---|---|---|---|
| Pinole Valley High School | 1992 | Pinole | California | 2012-08-11 |
| Pinole Valley High School | 1996 | Pinole | California | 2006-09-09 |
| Pioneer | 1984 | San Jose | California | 2004-11-06 |
| Pioneer | 1986 | San Jose | California | 2006-08-26 |
| Pioneer High '85-'87 | 1986 | San Jose | California | 2011-09-17 |
| Pioneer High School | 1971 | Whittier | California | 2011-07-30 |
| Pioneer High School | 1973 | Whittier | California | 2013-07-27 |
| Pioneer High School | 1974 | Whittier | California | 2014-10-11 |
| Pioneer High School | 1974 | Whittier | California | 2004-08-07 |
| Pioneer High School | 1979 | Whittier | California | 2009-01-01 |
| Pittsburg High School | 1958 | Pittsburg | California | 2008-09-20 |
| Pittsburg High School | 1996 | Pittsburg | California | 2006-09-01 |
| Pittsburg High School | 1998 | Pittsburg | California | 2008-10-11 |
| Pittsburg Senior High School | 1972 | Pittsburg | California | 2012-09-22 |
| Pittsburg Senior High School | 1980 | Pittsburg | California | 2005-11-12 |
| PIUS X | 1974 | Downey | California | 2004-10-16 |
| Pius X | 1976 | Downey | California | 2008-10-25 |
| Pius X | 1977 | Downey | California | 2008-10-25 |
| Pius X | 1978 | Downey | California | 2008-10-25 |
| Pius X | 1979 | Downey | California | 2008-10-25 |
| PIUS X | 1986 | Downey | California | 2006-08-12 |
| Pius X | 1997 | Downey | California | 2007-09-22 |
| Placer | 1988 | Auburn | California | 2008-06-21 |
| Placer High | 1997 | Auburn | California | 2007-07-21 |
| Placer High School | 1967 | Auburn | California | 2012-10-13 |
| Placer High School | 1992 | Auburn | California | 2007-08-11 |
| Placer High School | 1992 | Auburn | California | 2012-07-21 |
| Placer High School | 1997 | Auburn | California | 2007-07-21 |
| PLEASANT HILL | 1980 | Pleasant Hill | California | 2006-08-12 |
| Pleasant Hill High School | 1955 | Pleasant Hill | California | 2005-06-25 |