East Bethany: Bethany was set off from the Town of Batavia on June 8, 1812. The first town meeting was held on April 8, 1813 consisting of members of several small communities including Bethany Center, East Bethany, West Bethany, Little Canada, Linden and Putnam Settlement.

Alexander Rea purchased 28.1 acres (11.4 ha) in the town in 1802 for $56.20 and founded the village of Alexander. The next year he laid out a road, now Walnut Street and Route 98, north of the settlement. The town of Alexander was incorporated in 1812, from a part of the town of Batavia.

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Lancaster: In 1803, the Holland Land Company sold its first plot of land in the future town. The town of Lancaster was formed from the town of Clarence in 1833. The town was named after Lancaster, Massachusetts, but the reason for applying this name is not known. Originally called "Cayuga Creek", the town later incorporated and obtained the current name.