| Kami-Amakusa | |
| Native Name Lang: | ja |
| Settlement Type: | City |
| Seal Type: | Emblem |
| Pushpin Map: | Japan |
| Pushpin Map Caption: | Location in Japan |
| Coordinates: | 32.5°N 155°W |
| Subdivision Type: | Country |
| Subdivision Name: | Japan |
| Subdivision Type1: | Region |
| Subdivision Name1: | Kyushu |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Kumamoto Prefecture |
| Subdivision Type3: | District |
| Extinct Title: | Now part of |
| Leader Title: | Mayor |
| Leader Title1: | Vice Mayor |
| Unit Pref: | Metric |
| Area Total Km2: | 126.94 |
| Population Total: | 27,603 |
| Population As Of: | April 30, 2018 |
| Population Density Km2: | auto |
| Timezone1: | JST |
| Utc Offset1: | +09:00 |
| Blank Name Sec1: | City hall address |
| Blank Name Sec2: | Climate |
| Blank Info Sec2: | Cfa |
is a city located in Kumamoto Prefecture, Japan.
The modern city of Kami-Amakusa was established on March 31, 2004, from the merger of the towns of Himedo, Matsushima, Ōyano and Ryūgatake (all from Amakusa District).
As of April 30, 2018, the city has an estimated population of 27,603 [1] and a population density of 217 persons per km2. The total area is 126.94 km2.
Kami-Amakusa has a humid subtropical climate (Köppen climate classification Cfa) with hot, humid summers and cool winters. There is significant precipitation throughout the year, especially during June and July. The average annual temperature in Kami-Amakusa is . The average annual rainfall is with June as the wettest month. The temperatures are highest on average in August, at around, and lowest in January, at around . The highest temperature ever recorded in Kami-Amakusa was on 13 August 2018; the coldest temperature ever recorded was on 25 January 2016.
Per Japanese census data, the population of Kami-Amakusa in 2020 is 24,563 people. Kami-Amakusa has been conducting censuses since 1920.