Surname Richdale (Richdale 
) , globally, is a rare cognomen. The last name Richdale is habitual in New Zealand, where it is a rare surname, Canada, where it is a very rare surname, and Australia. In absolute terms, it is commonest in the United States, New Zealand, and Canada. Much less frequently, Richdale is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Richdale | United Kingdom, Canada, Australia, New Zealand, United States |
| lancelot eric richdale New Zealand teacher and amateur ornithologist (1900–1983), NZ (b. 1900) |
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| jace richdale Producer and writer, US (b. 1953) |
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| kathryn richdale researcher (ORCID 0000-0001-7045-3257) |
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| amanda l richdale researcher (ORCID 0000-0003-4911-7181) |
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Mr, James, Jenna, Terry, Emily, Helen, Freja, Wayne, Martha, Sammis, Lydia, Sydney, Andrew, Amanda, Ashley, Connor, Briant, Pamela, Rachel, Robert, Regina, Alfred, Linda, Laura, David, Ms, Guy, Joy, Merv, Andy, Brad, Kate, Kyla, Dana, Jane, Jace, John, Todd, Troy, Emma, Vera, Owen, Marie, Colin, Kadin, Derek, Denise, and Debbie