| Language | Name | Code |
|---|---|---|
| azb | شدلتسه | azb |
| Belarusian | Сядлецкі павет | be |
| be-tarask | Седлецкі павет | be-tarask |
| Bulgarian | Шедлешки окръг | bg |
| Cebuano | Powiat siedlecki | ceb |
| Czech | Okres Siedlce | cs |
| Welsh | Sir Siedlce | cy |
| German | Powiat Siedlecki | de |
| English | Siedlce County | en |
| en-ca | Siedlce County | en-ca |
| en-gb | Siedlce County | en-gb |
| Esperanto | Distrikto Siedlce | eo |
| Spanish | Condado de Siedlce | es |
| Estonian | Siedlce maakond | et |
| Basque | Siedlce barrutia | eu |
| Persian | شهرستان شدلتسه | fa |
| Finnish | Siedlcen piirikunta | fi |
| French | Siedlce | fr |
| Irish | Contae Siedlce | ga |
| Hebrew | מחוז שדליץ | he |
| Indonesian | Powiat Siedlce | id |
| Italian | distretto di Siedlce | it |
| Javanese | Powiat Siedlce | jv |
| Korean | 시에들체군 | ko |
| Lithuanian | Sedlcų apskritis | lt |
| Latvian | Sedlces apriņķis | lv |
| Macedonian | Шедлечки округ | mk |
| Malay (macrolanguage) | Powiat Siedlce | ms |
| nan | Siedlecki Kūn | nan |
| Dutch | Powiat Siedlecki | nl |
| Occitan (post 1500) | Powiat de Siedlce | oc |
| Polish | powiat siedlecki | pl |
| Portuguese | Condado de Siedlce | pt |
| pt-br | Condado de Siedlce | pt-br |
| Russian | Седлецкий повет | ru |
| Sardinian | distretto de Siedlce | sc |
| Slovak | Powiat siedlecki | sk |
| Turkish | Siedlce ilçesi | tr |
| Ukrainian | Седлецький повіт | uk |
| Vietnamese | Siedlecki | vi |
| war | Siedlce | war |
| Chinese | 謝德爾采縣 | zh |
| zh-hant | 謝德爾采縣 | zh-hant |