The Placentia Library is an Independent Special District, governed by a five member elected Board of Trustees. The governing board promulgates policies and regulations for the District as well as establishing the budget for tax rate.

! Election History

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|| Year || Trustees 1|| Trustees 2|| Trustees 3|| Trustees 4|| Trustees 5 || Race || Notes
| 2000 | []1 | []2 | []3 | | | [2000 PLD] |
| 2001 | | | | | | |
| 2002 | | | | [Betty Escobosa] | [Al Shkoler] |     2002 PLD | [Contest cancelled|http://www.smartvoter.org/2002/11/05/ca/or/race/6342/]
| 2003 | | | | | | |
| 2004 | [GAE WOOD] | [Richard Devecchio] | [JEAN TURNER] | | | [2004 PLD] |
| 2005 | | | | | | |
| 2006 | | | | [Betty Escobosa] | [Al Shkoler] |     [2006 PLD] |
| 2007 | | | | | | |
| 2008 | []1 | []2 | []3 | | | [2008 PLD] |
| 2009 | | | | | | |
| 2010 | | | | [Betty Escobosa] | [Al Shkoler] |     [2010 PLD] |
| 2011 | | | | | | |
| 2012 | [Elizabeth Minter] | [Richard Devecchio] | [Gayle Carline] | | | [2012 PLD] |
| 2013 | | | | | | |
| 2014 | | | | [Betty Escobosa] | [Al Shkoler] |     2014 PLD | [Contest cancelled|http://www.smartvoter.org/2014/11/04/ca/or/race/6342/]
| 2015 | | | | | | |
| 2016 | [Elizabeth Minter] | [Richard Devecchio] | [Gayle Carline] | | | 2016 PLD | [Contest cancelled|http://www.smartvoter.org/2016/11/08/ca/or/race/6341/]
| 2017 | | | | | | |
| 2018 | | | | [Sherri Dahl] | [Al Shkoler] |     [2018 PLD] |
| 2019 | | | | | | |
| 2020 | [Jo-Anne Martin] | [Hilaire Shioura] | [Gayle Carline] | | | [2020 PLD] |
| 2021 | | | | | | |
/%

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[Buena Park Library District] | [Organizations] | [Capistrano Bay Community Services District]
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