(See also the Clickable Map of the area.)
Halltown was named for the man who established the first business in the area, George Hall.
In the year before Route 66 was officially established, Matilda Winfrey, in her writing of "Our Town, Halltown As I Knew It," provided the following inventory of local services: "In 1925 our town boasts three churches, three general stores, one drug store, one bank, one feed mill, one telephone exchange, one canning factory, one blacksmith shop, two garages, one lumber yard, two barber shops, nine filling stations, three private homes in which one can procure rooms and comfortable beds at reasonable prices, two cafes, and Harvey's Chili Hut." [Editor's aside: I'm curious why Harvey's seems to have gotten such special treatment instead of being lumped in with the two cafes—was the author connected to it in some way?]
It's uncertain just when Halltown first gained its reputation as the "Antique Capital of the World," but when Jack Rittenhouse passed through Halltown in 1946 while working on his A Guide Book to Highway 66, he characterized it as being a good place to shop for antiques; that reputation persists to this day. The most prominent place to satisfy your antiques craving appears to be the WhiteHall Mercantile building in the center of town.