Rancho Santa Margarita is an incorporated community governed by a city council.
Year indicates the start of term, not the election.
| Year | Member 1 | Member 2 | Member 3 | Member 4 | Member 5 | Mayor | Mayor Pro Tem |
|---|---|---|---|---|---|---|---|
| 2000 | |||||||
| 2001 | |||||||
| 2002 | |||||||
| 2003 | Gary Thompson | Neil Blais | James Thor | ||||
| 2004 | |||||||
| 2005 | |||||||
| 2006 | |||||||
| 2007 | |||||||
| 2008 | |||||||
| 2009 | |||||||
| 2010 |