Lista Ong-urilor din Harghita
| Denumire | Județ | Localitate ▲ ▼ |
| Asociatia Ery Handbal | Harghita | Zetea |
| Asociatia Eszmozgalom Egyesulet | Harghita | Odorheiu Secuiesc |
| Asociatia Eszterlanc | Harghita | Suseni |
| Asociatia Esztet | Harghita | Leliceni |
| Asociatia Etele Egyesulet | Harghita | Sanmartin |
| Asociatia Eterna Luce | Harghita | Livezi |
| Asociatia Etnoculturala Concordia | Harghita | Balan |
| Asociatia Eufonia Zenekar | Harghita | Suseni |
| Asociatia Eurifitin | Harghita | Miercurea Ciuc |
| Asociatia Eurifk | Harghita | Cristuru Secuiesc |
| Asociatia Eurocultura | Harghita | Miercurea Ciuc |
| Asociatia Europai Romaniaert Egyesulet | Harghita | Odorheiu Secuiesc |
| Asociatia Eurosal Toplita | Harghita | Toplita |
| Asociatia Eustress | Harghita | Miercurea Ciuc |
| Asociatia Eutikhus | Harghita | Ighiu |
| Asociatia Eventera | Harghita | Miercurea Ciuc |
| Asociatia Exar Consult | Harghita | Odorheiu Secuiesc |
| Asociatia Explorer | Harghita | Lacu Rosu |
| Asociatia Extreme Bike | Harghita | Odorheiu Secuiesc |
| Asociatia Extreme Nature | Harghita | Gheorgheni |
