Sister Cities

Sister Cities International of Oklahoma City (SCI OKC) is a nonprofit citizen diplomacy network. We are devoted to creating and strengthening partnerships between Oklahoma City and our active sister cities. Our efforts are aimed at increasing global cooperation at the municipal level, promoting cultural understanding and stimulating economic development.

SCI leads the movement for local community development and volunteer action by motivating and empowering private citizens, municipal officials and business leaders to conduct long-term programs of mutual benefit with our sister cities.

Haikou, China

• Haikou, is a city located to the north of Hainan island. It is the capital of Hainan Province of the People's Republic of China, and has an estimated population of 830,192 (2006), making it by far the largest city on the island.

Puebla, Mexico

• The city of Puebla, officially Heroic Puebla de Zaragoza (nicknamed Angelopolis) is the capital and largest city of the Mexican state of Puebla. The city has a population of 1,399,519 (the municipality, 1,485,941). The metropolitan area of the city, however, extends over 10 municipalities of the state of Puebla,  and with a population of 2,109,049 it is fourth most populous metropolitan area in Mexico. Puebla is an important industrial, cultural and educational center of Mexico for the central and south-east regions and it is also one of the oldest colonial cities in the continent.

Rio de Janeiro, Brazil

• Rio de Janeiro, is the second largest city in Brazil and South America, behind Sao Paulo, and the third largest metropolitan area in South America, behind Sao Paulo and Buenos Aires, Argentina. The city is capital of the state of Rio de Janeiro. It was the capital of Brazil for almost two centuries, from 1763 to 1822 while it was a Portuguese colony and from 1822 to 1960 as an independent nation. It was the capital of the Portuguese Empire from 1808 to 1821. Commonly known as just Rio, the city is also nicknamed A Cidade Maravilhosa, or "The Marvelous City."

Tainan, Taiwan

• Tainan (Southern Taiwan), is the fourth largest city in Taiwan after Taipei, Kaohsiung, and Taichung. It is officially administrated as a provincial city of Taiwan Province in the Republic of China.

Taipei, Taiwan

• Taipei has been the de facto and "provisional" capital of the Republic of China (ROC), commonly known as Taiwan, since 1949. It is situated on the Danshui River, almost at the northern tip of the country, about 25 km southwest of Keelung, which is its port on the Pacific Ocean.

Ulyanovsk, Russia

• Ulyanovsk, formerly Simbirsk, is a city on the Volga River in Russia, 893 km east from Moscow. It is the administrative center of Ulyanovsk Oblast, and the birthplace of Vladimir Lenin.