There will be a Vigil Eucharist at 6pm on Saturday and a Sung Eucharist, followed by scones and tea, at 8am on Sunday.

The 10am Sunday service will be followed by a sausage sizzle and jumping castle.

The earliest Anglican church and parsonage at Dubbo was built in 1859. The first incumbent, Reverend W Coombes, was recorded as commencing his ministry in 1865.

The building of the present day Holy Trinity church began in 1875. The first service in the building took place 140 years ago, in 1876.

Over the lifetime of the parish places of worship have been dotted in central, south, north and west Dubbo and at Coboco Hall, Elong Elong, Emmagool, Mogriguy, Minore, Whylandra and Wongarbon.

Two boarding homes have existed - St Faith's for girls in North Dubbo and St Francis for boys, adjacent to the present Holy Trinity church.

Holy Trinity was for many years the home base for the Brotherhood of the Good Shepherd, which ministered in the more remote areas north and west of Dubbo. Holy Trinity Retirement Village, consisting of eight self-care units, was dedicated by Bishop E. K. Leslie in 1979.

The former Brotherhood retirement building now serves as a very busy and successful parish opportunity shop.

Current rector of the parish, Canon Brett Watterson, said the Anglican Church continued to play a vital role today "to be a Christian witness in the city of Dubbo".

"The Anglican diocese of Bathurst and the parish of Dubbo have had and continues to live in challenging times, yet they are also times of great opportunity," he said,

"It never ceases to amaze me that God is faithful and the one constant in our life. After all, the church exists to share the good news of God's love in Jesus as the spirit and word of God leads and directs.

"We do this through many varied and exciting ways. There are the constants of us being a prayerful and worshipping community. We are very much a church for the people.

"In recent times we have seen the continuing ministry of Reverend Gloria Shipp with Walkabout (Indigenous) Ministries. She is also on a national body for Indigenous ministry (NATSIAC).

"The ministry of Anglicare continues to gain momentum. With the sale of the Macquarie Anglican Grammar School to the Sydney Schools Commission its future is consolidated."

Canon Brett said the parish had begun a process of renewed vision as it looked forward to the future.