|Full name||Kate Quimby|
|Family|| Ben Quimby (son)|
Jane Quimby (daughter)
|Friends||Gray Chandler Murray|
|Portrayed by||Teri Hatcher|
|First appearance||The Surprise|
Kate Quimby is Ben and Jane's mother. She left them when Jane was a baby. She sent Jane a letter for her birthday and Ben hides it from Jane. Kate comes back during Jane's surprise party. She also meets Gray not knowing Jane's secret almost exposing her. Later on she sets up a dating profile for Gray.