Rossmoor's homes are grouped into mutuals, which operate individually but cooperate as well.

• First Walnut Creek Mutual - Mel Fredlund, President
  
• Second Walnut Creek Mutual - Barbara El-Baroudi, President
• Third Walnut Creek Mutual - Charles Sanderson, President
• 4th Mutual - Michael Herr, President
• 5th Mutual - Charles Swinden, President
• Mutual 8 - Mary Jean Parton, President
• Mutual 22 - John Mitchell, President
• Mutual 28 - James Jardine, President
• Mutual 29 - Don Wayne, President
• Mutual 30 - John Herron, President
• Mutual 48 - John Reppart, President
• Mutual 56 - Barbara May, President
• Mutual 58 - Jim Riggs, President
• Mutual 59 - Walt Foskett, President
• Mutual 61 - Robert Donovan, President
• Mutual 65 - Mary Bell, President
• Mutual 68 - James Hartnett, President