No.

Province

Country

Date

1

Hyogo Prefecture

​Japan

Sept. 28, 1990

2

Hawaii States

USA

June 30, 1992

3

Jeju Special Autonomous Province

​Republic of Korea

Oct. 06, 1995

4

Crimea Autonomous Republic

Ukraine (annexed by Russia on Mar.18, 2014)

Apr. 15, 1996

5

Cebu Province

the Philippines

June 09, 1996

6

Arad County

Romania

Sept. 27, 2000

7

Salzburg State

Austria

Oct. 24, 2000

8

Prince Edward Island

​Canada

June. 20, 2001

9

South Sinai Province

​Egypt

Aug. 03, 2002

10

Northern Finland

Finland

Dec. 11, 2002

11

Baleares Autonomous Region

​Spain

July 29, 2004

12

Southern Province

​Sri Lanka

Apr. 23, 2005

13

Phuket Province

​Thailand

Sept. 25, 2005

14

Canary Autonomous Region

​Spain

Nov. 11, 2005

15

Lubuskie Province

Poland

Feb. 24, 2006

16

East New Britain Province

​Papua New Guinea

Sept. 28, 2006

17

Kampong Cham

​Cambodia

Mar. 27, 2007

18

Quang Ninh

​Vietnam

Apr. 19, 2007

19

Quintana Roo

​Mexico

Sept. 30, 2008

20

Kyzylorda State

​Kazakhstan

July 03, 2009

21

Parana

​Brazil

Mar. 13, 2010

22

Gotland County

​Sweden

Nov. 02, 2010

23

Autonomous Region of Sardinia

​Italy

Oct. 13, 2011

24

Bali

​Indonesia

Oct. 20, 2011

25

Nampula

​Mozambique

Sept. 18, 2013

26

Penang State

​Malaysia

Nov. 07, 2013

27

South Moravian Region

​Czech Republic

Apr. 29, 2016

28

Pest County

​Hungary

June 12, 2016

29

Luand Prabang

​Laos

July 16, 2016

30

Wicklow County

Ireland

July 10, 2017

31

Palawan Province

the Philippines

July 21, 2017

32

Department of Rocha

Uruguay

Nov. 30, 2017

33

Southern Nations, Nationallities, and People's Region (SNNPR)

Ethiopia

June 01, 2018

34

Plovdiv Region

Bulgaria

Oct. 19, 2018

35

State of Yap

Federated States of Micronesia

Nov. 17, 2018

36

Autonomous Province of Vojvodina

Serbia

Mar. 29, 2019

37

Department of Sucre

Colombia

Sept. 18, 2019

38

Preah Sihanouk

Cambodia

Sept. 20, 2019

39

Zadar County

Croatia

Dec. 13, 2019

40

Grodno Administrative Region

Belarus

Dec. 21, 2020