Timbillica is a locality in the Bega Valley Shire of New South Wales, Australia.
As of the 2021 Australian census, no people resided in Timbillica, down from 9 in the . At the 2016 census, the median age of persons in Timbillica was 56 years. There were fewer males than females, with 37.5% of the population male and 62.5% female. The average household size was 2 people per household.