The ALS has made the call after the Law Society of NSW made a drug court for the region its number one priority for the NSW election.

ALS deputy principal solicitor Emily Winborne said the proposed rehabilitation facility would create the necessary infrastructure for a drug court.

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"Drug courts are a relatively inexpensive way to reduce crime and incarceration rates including addressing the over-incarceration of Aboriginal and Torres Straight Islander peoples," Ms Winborne said.

"Crime in Dubbo, as well as across the western region, occurs in no small measure because insufficient investment has been made to address the social and criminal justice problems posed by offenders who are addicted to illicit substances."

Ms Winborne said Dubbo Regional Council - which has also been pushing for the facility - had taken a strong stance but now political parties and candidates contesting the state seat needed to formally commit to both projects.

"It is only if we get these firm commitments that we can be assured the necessary resources will follow," she said.