Koga, Ibaraki

Koga
古河市
Koga city hall
Koga city hall
Flag of Koga
Official seal of Koga
Location of Koga in Ibaraki Prefecture
Location of Koga in Ibaraki Prefecture
Koga is located in Japan
Koga
Koga
 
Coordinates: 36°10′41.7″N 139°45′19.6″E / 36.178250°N 139.755444°E / 36.178250; 139.755444
CountryJapan
RegionKantō
PrefectureIbaraki
Government
 • MayorChikara Hariya (since December 2016)
Area
 • Total123.58 km2 (47.71 sq mi)
Population
 (January 2024)
 • Total137,512
 • Density1,100/km2 (2,900/sq mi)
Time zoneUTC+9 (Japan Standard Time)
Phone number0280-92-3111
Address2248 Shimoōno, Koga-shi, Ibaraki-ken 306-0291
ClimateCfa
WebsiteOfficial website
Symbols
FlowerPrunus persica
TreeZelkova serrata

Koga (古河市, Koga-shi) is a city located in Ibaraki Prefecture, Japan. As of 1 January 2024, the city had an estimated population of 137,512 in 58,276 households and a population density of 1113 persons per km². The percentage of the population aged over 65 was 28.98%.[1] The total area of the city is 123.58 square kilometres (47.71 sq mi).

  1. ^ "Ibaraki prefectural official statistics" (in Japanese). Japan.