Ainderby Miers with Holtby is a civil parish in North Yorkshire, England. The population taken at the 2011 Census was less than 100. Information is now kept with the parish of Hackforth. However, in 2015, North Yorkshire County Council estimated that the population of the parish was 20. The parish is bounded to the east by the A1(M) motorway, and is about 3 miles (5 km) south of Catterick, and 4 miles (6.4 km) north of Bedale. It includes the hamlets of Ainderby Miers and Holtby Grange.