Western Cluster manager Karen Windley said 75 years is a huge milestone for the organisation, which started as a service for seniors and evolved into an array of community services.

"To me, 75 years of service shows how reliable and trustworthy we are as an organisation," Mrs Windley said.

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"We're an organisation who has endured for 75 years.

"We've grown exponentially throughout the years and have really stood the test of time."

Service for Seniors volunteer of six-years Jackie O'Hare said the organisation is 'wonderful'.

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"The organisation has helped so many people in so many ways over those 75 years that you would undoubtedly notice its absence," Mrs O'Hare said.

Mrs Windley said as part of the celebrations, BaptistCare has produced books which captured 75 stories for each year of its existence.

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"We have lovely, hard-covered books of our story from the very beginning to now to give away during our celebrations."

The celebration will be held at the Darling Street office on February 27.