| Year | Title | Role | Notes |
| 1957 | The Phil Silvers Show | Suzie | Episode: "The Big Scandal" |
| 1959 | Omnibus | | Episode: "Malice in Wonderland" |
| 1960 | Adventures in Paradise | Venus | Episode: "Open for Diving" |
| 1961 | The Defenders | Brandy Gideon Morfoot | Episode: "Gideon's Follies" |
| 1962 | Route 66 | Vicki Russell | 2 episodes |
| 1963 | The Twilight Zone | Miss Devlin | Episode: "Of Late I Think of Cliffordville" |
| 1963 | The Danny Kaye Show | Herself | Episode: "1.12" |
| 1964 | The Greatest Show on Earth | Willa Harper | Episode: "Of Blood, Sawdust, and a Bucket of Tears" |
| 1964–1965 | My Living Doll | Rhoda Miller | Nominated – Golden Globe Award for Best TV Star – Female |
| 1965 | Vacation Playhouse | Kris Meeker | Episode: "Three on an Island" |
| 1966–1967 | Batman | Catwoman / Minerva Matthews / Miss Klutz | 13 episodes |
| 1966 | The Beverly Hillbillies | Ulla Bergstrom | Episode: "The Beautiful Maid" |
| 1966 | F Troop | Cinthia Jeffries / Yellow Bird | Episode: "Yellow Bird" |
| 1967 | The Monkees | April Conquest | S1:E29, "Monkees Get Out More Dirt" |
| 1967 | Star Trek: The Original Series | Eleen | Episode: "Friday's Child" |
| 1968 | Get Smart | Ingrid | Episode: "The Laser Blazer" |
| 1969 | It Takes a Thief | Susannah Sutton | Episode: "The Funeral Is on Mundy" |
| 1970 | McCloud | Adrienne Redman | Episode: "Portrait of a Dead Girl" |
| 1970–1972 | Love, American Style | Various Roles | 4 episodes |
| 1971 | NBC Children's Theatre | Herself | Episode: "Super Plastic Elastic Goggles" |
| 1971 | Bewitched | Ophelia | Episode: "The Eight Year Itch Witch" |
| 1973 | Columbo | Lisa Chambers | Episode: "Double Shock" |
| 1975 | ABC's Wide World of Mystery | | Episode: "The Black Box Murders" |
| 1975 | McMillan & Wife | Luciana Amaldi | Episode: "Aftershock" (Credited as "Julie Neumar") |
| 1976 | The Bionic Woman | Claudette | Episode: "Black Magic" |
| 1976 | Monster Squad | Ultra Witch | Episode: "Ultra Witch" |
| 1978 | Jason of Star Command | Queen Vanessa | 2 episodes |
| 1979 | The Love Boat | Marla Samms | Episode: "The Reunion/Haven't I Seen You?/Crew Confessions" |
| 1980 | Buck Rogers in the 25th Century | Zarina | 2 episodes |
| 1982 | The Powers of Matthew Star | Nian | Episode: "The Triangle" |
| 1982 | CHiPs | Cora Dwayne | Episode: "This Year's Riot" |
| 1983 | Fantasy Island | Doralee | Episode: "King of Burlesque/Death Games" |
| 1983 | Hart to Hart | Eve | Episode: "A Change of Heart" |
| 1984 | High School U.S. | Stripper | TV pilot |
| 1985 | Half Nelson | Herself | Episode: "The Deadly Vase" |
| 1995 | Hope & Gloria | Herself | Episode: "Whose Poppa? |
| 1996 | Melrose Place | Herself | Episode: "Triumph of the Bill" |
| 1998 | Maggie | Catwoman | Episode: "If You Could See What I Hear" |
| 2006 | According to Jim | Julie | Episode: "The Grumpy Guy" |
| 2010 | Batman: The Brave and the Bold | Martha Wayne (voice) | Episode: "Chill of the Night!" |
