There are traces of a Roman villa at Oatlands Farm. The manor house was built in 1660.
Finstock railway station on the Cotswold Line is actually closer to Fawler.
"Fawler's population rose from 112 in 1801 to 161 in 1811, and fell to 123 in 1841. Numbers thereafter fluctuated, reaching a high point of 172 in 1891 but falling again to 155 in 1961. Both hamlets, and particularly Finstock, have attracted commuters in the 1960s, and in 1969 the population of Finstock and Fawler was said to be 950." (Source: Victoria County History of Oxfordshire)
Victoria County History of Oxfordshire, volume 10, chapter on Charlbury.