Mrs. Delores Landingham, played by Kathryn Joosten and Kirsten Nelson, is the fictional personal secretary for the President of the United States in the first two seasons of American serial political drama The West Wing.

On The West Wing, Mrs. Dolores Landingham[1] is the personal secretary of Josiah Bartlet, the fictional president of the United States played by Martin Sheen.

Martin Sheen later said that he was supposed to have been present in the scene as well, but it was changed to not overshadow Ziegler and Mrs. Landingham, commenting that the two "were deeply affected by the incident: a woman who has lost two sons and a man who gave this guy clothes to keep warm".

"[9] Later, in the show's present moment, appearing as his conscience, Mrs. Landingham has a conversation with Bartlet in the Oval Office while a thunderstorm rages — reflecting his inner turmoil — reminding him that there is always an action he can take regardless of the challenges he faces as he must give a press conference following an announcement that he has concealed a diagnosis of multiple sclerosis from the public.

This inadvertently inspired Sorkin to create serious drama for the Bartlet character by suddenly killing off his lifelong family friend and secretary, in a scene Heisler described as "perfectly gut-wrenching".

[1] The Los Angeles Times wrote that Mrs. Landingham's tendency to ground characters in an otherwise idealized show allowed the audience to identify themselves—or their mothers—with the sexagenarian presidential secretary.

[14] That same year, Showbiz Cheat Sheet called Mrs. Landingham "a beloved part of" The West Wing,[15] and in 2021, the Waco Tribune-Herald described her as "a sentimental favorite" character from the series.

[2] After the character was killed off in 2001, the California State Assembly observed a moment of silence in honor of Mrs. Landingham, with Democratic Assemblyman Kevin Shelley adjourning that body in memory of "a great American" who contributed to the nation in ways "too numerous to count".

[16] In 2014, The Atlantic placed Mrs. Landingham as 13th on their ranking of 114 characters from The West Wing, commenting that she had few, but meaningful, interactions with Leo McGarry, Charlie Young, and the President.

[5] In 2015, the United States' General Services Administration released a Slack bot named "Mrs. Landingham" to ease new hires through their onboarding; the many fans of The West Wing at 18F felt it right to "[bring] back the beloved character".