The body of a man has been found inside a home, along with a seriously injured woman, with another man now charged with murder in regional NSW.

Police attended a home on Gisborne St in Wellington, about 40 minutes southeast of Dubbo, after receiving reports of a concern for welfare about 8.10am on Saturday,

Inside the home officers found the body of a 76-year-old man as well as a seriously injured woman, aged 74.

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The woman was treated by paramedics at the scene before being airlifted to hospital where she remains in a critical condition.

Police extensively searched the area and about two hours later arrested a 30-year-old man inside a fast-food restaurant on Arthur St.

He was charged with murder (DV) and cause grievous bodily harm to person with intent (DV).

The man will appear before court on Sunday while police continue to investigate.