Kapaa (Kauai dialect: Tapaa) is a census-designated place (CDP) in Kauai County, Hawaii, United States. The population was 9,472 at the 2000 census.The town has a large concentration of hotels, shopping centers, and tourist-oriented shops and restaurants. Unfortunately, it also has the worst traffic congestion on the island of Kauai, with a regular mainland-style rush hour each afternoon. The state government has built an inland bypass road and implemented a contraflow lane reversal program; these measures have only partially alleviated the traffic problems.

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