| Braintree Musical Society | An amateur musical theatre group based in Braintree. They perform two musical shows per year |
| Leigh Operatic & Dramatic Society | Based in Leigh on Sea and performing around the Southend area. |
| Witham Operatic Workshop | Witham Operatic Workshop (WOW) were formed in 1995 and have performed several successful shows. |
| The Little Theatre Club | Established in 1949, this society produces two shows each year in the Southend area |
| Southminster Operatic and Choral Society | An operatic society based in the Southminster area. |
| Colchester Operatic Society | Operatic society producing Musical Theatre in Colchester. aka COS and CO2. |
| Starlight Productions | Put on a variety of shows, musicals, drama in the Southend on Sea area. |
| Chelmsford Amateur Operatic & Dramatic Soc. | Popular society from the county town of Essex |
| Forest Musical Productions | Performing 2 large-scale musicals per year as well as plays, concerts and caberets. |
| Clacton Amateur Operatic Society | CAOS puts on two shows annually in the Clacton area. |
| Benfleet Operatic Society | A popular operatic Society in Benfleet. |
| Rayleigh Operatic & Dramatic Society | An Operatic and dramatic Society presenting a musical, plays and pantomime annually |
| Stage One Theatre Company | One of Essex’ premier musical theatre companies. An award-winning group specialising in modern musicals |
| 2 Faced Productions | With an aim to perform new, modern, lively musicals at professional theatres in the area |
| Basildon Operatic Society | Long-established society from Basildon in the south of the county |
| C Dot | CDOT has been producing musicals and light opera in the Thurrock area since 1971 |
| Billericay Musical Theatre Group | Previously Billericay Operatic Society – perform at the Civic Theatre in Chelmsford |
| Havering Music Makers | Popular musicals with this well-established society from the South West of the County |
| Frinton Musical Theatre | Musical theatre in the local Frinton area. |
| Bishop’s Stortford Musical Theatre Company | Brings entertainment, enjoyment and relaxation to the people of the town. |
| Southend-on-Sea Operatic & Dramatic Society | One of the oldest Op Socs in the UK, founded in 1890, presenting 2 shows each year at the Cliffs Pavilion |
| Springers Amateur Operatic & Dramatic Society | Chelmsford based theatre group with junior group Offspringers for children. |
| The Phoenix Theatre Company, Chelmsford | Theatre Company in Chelmsford. Formerly The Moulsham Lodge Amateur Dramatic Society. |
| Saffron Walden Amateur Operatic Society | Perform operatic works, comedies, Gilbert & Sullivan, operettas of Offenbach & Lehar and popular musicals. |
| Loughton Operatic Society | Friendly Operatic Society in and around Loughton. |
| Thurrock Thameside Musical Society | TTMS presents popular shows and is a progressive, young, enthusiastic, forward thinking group. |
| Saffron Walden Music Hall Society | Promotes and displays music hall and variety in live theatre performances. |
| Dunmow Players | From popular musicals to favourite operettas, our aim is put on shows of a high standard. |
| Ingatestone Musical and Operetta Group | For more than 30 years IMOG has been performing musicals and light operettas in Ingatestone, Essex |
| Brentwood Operatic Society | A society which performs at the Queen’s Theatre, Hornchurch and at the Brentwood Theatre |
| Shenfield Operatic Society | Usually produces two shows per year, one on a large scale and another smaller show |
| Chelmsford Theatre Workshop | Amateur theatre group with a tradition for innovative theatre |
| Lyrebird East | A vibrant young chamber company bringing opera to a wider audience in Essex. |
| Stanley Hall Opera | Put on a Midsummer Festival every year in an idyllic setting near Halstead. |
| Witham Amateur Operatic Society | WAOS have been producing and performing light opera and musicals in Witham for over 70 years, |
| Rainbow 2000 | Lively group from the Benfleet area with a professional touch |
| Thurrock Operatic Society | ‘Amateur theatre professionally staged’ |
