Johnson's Addition is a hamlet in southern Alberta, Canada within the Municipal District of Taber. It is adjacent to the western boundary of the Town of Taber at the intersection of Highway 3 and Highway 864 (Range Road 170).

The hamlet is named after Aaron Johnson, original owner of 40 acres that today fall under Johnson's Addition.

In the early twentieth century, Utah-born Aaron Johnson purchased forty acres of land outside Taber, where he served as assistant postmaster. (He assumed the role of postmaster for a short time between June and September 1907.)

In 1907, he subdivided the land into smaller plots which he then named "Johnson's Addition." He began selling the lots to buyers in September of that year. Johnson placed advertisements in Taber's local newspaper aimed especially at workers employed by the nearby coal mine. The available lots were primarily for constructing residential properties, though some were suitable for farming.

Johnson's son, Frank, himself a miner, also worked as a courier for a butcher in the area. Many residents of Johnson's Addition owned dogs, which had a habit of chasing after Frank's wagon when he drove meat through the settlement. Frank nicknamed the area "Dog Town," which was also adopted by residents for a time.

In May 1923, farmers in Johnson's Addition agreed to cede land to the provincial government to extend the settlement's main road to the highway. This provided the Addition with better transport links to Taber.

Johnson's Addition was declared a hamlet by Marvin Moore, then-Minister of Municipal Affairs, on September 15, 1982.

In the 2021 Census of Population conducted by Statistics Canada, Johnson's Addition had a population of 126 living in 42 of its 42 total private dwellings, a change of -3.1% from its 2016 population of 130. With a land area of 0.19 km² (0.073 sq mi), it had a population density of 663.2/km² (1,717.6/sq mi) in 2021.