Croftby is a rural locality in the Scenic Rim Region, Queensland, Australia. The town of Teviot is within the locality (28°08′18″S 152°35′15″E / 28.1383°S 152.5875°E / -28.1383; 152.5875 (Teviot (town))). In the 2021 census, Croftby had a population of 129 people.

In the 2016 census, Croftby had a population of 133 people. The locality contains 58 households, in which 51.1% of the population are males and 48.9% of the population are females with a median age of 53, 15 years above the national average. The average weekly household income is $1,125, $313 below the national average. 7.4% of Croftby’s population is either of Aborigional or Torres Strait Islander descent. 67.1% of the population aged 15 or over is either registered or de facto married, while 32.9% of the population is not married. 23.1% of the population is currently attending some form of a compulsory education. The most common nominated ancestries were English (32.8%), Australian (25.3%) and Irish (10.8%), while the most common country of birth was Australia (77.0%), and the most commonly spoken language at home was English (84.4%). The most common nominated religions were Anglican (27.5%), No religion (22.1%) and Catholic (16.8%). The most common occupation was that of the manager (34.0%) and the majority/plurality of residents worked 40 or more hours per week (43.4%).