| Judge Rinder's Crime Stories | ITV | — | 1 | 10 |
| Judge Romesh | U&Dave | comedy television program, court show | 2 | 22 |
| Juke Box Jury | BBC One | — | — | — |
| Julia Jekyll and Harriet Hyde | BBC Children's and Education | — | — | — |
| Julian Fellowes Investigates: A Most Mysterious Murder | BBC One | docudrama | 1 | 5 |
| Juliet Bravo | British Broadcasting Corporation | — | 6 | 88 |
| Jumble | ITV | game show | 2 | 59 |
| Jungle | — | — | — | — |
| Jungle Run | ITV | — | 8 | 99 |
| Junglies | ITV | — | 1 | 13 |
| Junior Bake Off | CBBC, Channel 4 | — | 4 | 43 |
| Junior Doctors: Your Life in Their Hands | BBC Three | documentary film, documentary television program | 3 | 22 |
| Junior MasterChef | BBC One | cooking show | 5 | 65 |
| Junior Paramedics | BBC Three | — | 1 | 7 |
| Junior Showtime | ITV | children's television series | 8 | 190 |
| Juniper Jungle | British Broadcasting Corporation | — | — | 13 |
| Jupiter Moon | Galaxy | science fiction television series | — | 150 |
| Just a Gigolo | — | sitcom | 1 | 7 |
| Just Act Normal | — | — | — | — |
| Just Another Day | — | — | — | 20 |
| Just for Laughs | BBC One | comedy television series | 5 | — |
| Just Good Friends | BBC One | sitcom | 3 | 22 |
| Just Tattoo of Us | MTV | reality television | 1 | 18 |
| Just the Two of Us | BBC One | reality television | 2 | 14 |
| Just William | BBC One | — | — | 4 |
| Just William | BBC One | — | 2 | 12 |
| Just William | ITV | sitcom | 2 | 26 |
| Justice | ITV | — | 3 | 39 |
| Justice | BBC One | drama television series | 1 | 5 |
| Justin Lee Collins: Good Times | Channel 5 | — | 1 | 10 |
| Justin Lee Collins: Turning Japanese | — | documentary television program | — | — |
| K-9 | Network 10, Disney XD | science fiction television series, children's television series, comedy television series | 1 | 26 |
| K.T.V | — | — | 3 | — |
| Kaleidoscope | British Broadcasting Corporation | — | — | — |
| Kaos | Netflix | drama television series, comedy television series, fantasy television series | — | 8 |
| Kappatoo | ITV | — | 2 | 27 |
| Karachi Kops | — | — | — | — |
| Karaoke | BBC One | — | — | 4 |
| Karen Pirie | ITV | crime film | 1 | 3 |
| Kate | — | — | 3 | 38 |
| Kate & Koji | ITV | sitcom | 1 | 6 |
| Kate Garraway's Life Stories | — | — | 13 | — |
| Katie | ITV2 | reality television | — | 40 |
| Katie Morag | CBeebies | — | 2 | 39 |
| Katy | BBC Children's and Education | — | 1 | 3 |
| Katy Brand's Big Ass Show | ITV2, ITV | — | 3 | 19 |
| Kavanagh QC | ITV | drama television series | 5 | 29 |
| Keep It in the Family | Thames Television | sitcom | 5 | 31 |
| Keep It in the Family | — | — | — | — |
| Keep It in the Family | ITV | game show | 2 | 13 |
| Keep Your Enemies Close | BBC Children's and Education | — | — | — |
| Keeping Up Appearances | BBC One | sitcom | 5 | 44 |
| Keith Lemon's LemonAid | — | — | 1 | 6 |
| Keith Lemon's Very Brilliant World Tour | ITV2 | — | 1 | 6 |
| Kelvin's Big Farming Adventure | — | — | — | — |
| Kenilworth | — | drama television series | — | — |
| Kerching! | BBC One | sitcom | — | 28 |
| Kerwhizz | CBeebies | — | 2 | 41 |
| Kessler | BBC One | drama television series | — | 6 |
| Kevin Bridges: What's the Story? | BBC One | — | 1 | 6 |