Shimotsu (下津町, Shimotsu-chō) was a town located in Kaisō District, Wakayama Prefecture, Japan.

As of 2003, the town had an estimated population of 14,481 and a density of 363.57 persons per km2. The total area was 39.83 km2.

On April 1, 2005, Shimotsu was merged into the expanded city of Kainan.

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