China, USA, Russia and Japan are the top 4 countries with the most number of rocket launch sites.
1. Jiuquan Satellite Launch Center , China
The Chinese Jiuquan Satellite Launch Center is a Chinese space vehicle launch facility located in the Gobi Desert about 1,600 km (994 mi) west-northwest of Jiuquan city (renamed from Suzhou in 1962), which is itself about 560 km (348 mi) west of Ejin Banner, Inner Mongolia.
It was founded in 1958, the first of China’s four spaceports, for the manned program and to launch satellites using expendable carriers converted for that purpose. The next three were (Wenchang Satellite Launch Center, Taiyuan Satellite Launch Center, and Xichang Satellite Launch Center).
2. Florida , USA
Spaceport Florida is a former proposed spaceport in Brevard County, Florida. It was selected by NASA in 2009 for development as one of the locations for a future commercial orbital launch complex to support robotic cargo flights to the International Space Station, but scrapped due to local opposition. The facility would have been built at the site of the former Cape Canaveral Air Force Station or on adjacent land. As initially planned there were three separate pads with two used by SpaceX and one used by other users at different times. All would have been convertible so that all three could handle both Falcon 9 and Falcon Heavy rockets.
3. Baikonur , Kazakhstan
Baikonur Cosmodrome is a spaceport located in southern Kazakhstan. The place was selected to build the Soviet Union’s space launch facilities in 1956, and served as the primary Soviet cosmodrome until the collapse of the USSR in 1991. Afterward, there have been talks about possibly shifting all flights to the Angara spaceport under development at Plesetsk Cosmodrome, but by 2014 Baikonur was still used extensively for both manned and unmanned launches carrying international crews and supplies into orbit. It is currently leased by the Kazakh Government to Russia through 2050 with an option for another 10 years. There are plans to completely modernize equipment at BAIkonour and to create a tourist facility in the near future.
4. Tanegashima, Japan
Tanegashima Space Center (TNSC) is the name of both a rocket launch site and an island about 40 kilometers south of Kyūshū in southern Japan. The island is part of the city of Minamitane on Tanegashima Island. It was home to NASDA’s large Ariane-4 H10K liquid hydrogen fueled boosters used for heavy geostationary satellites from 1994 until 2006 when they shifted their focus to the next generation H-II launcher series which uses solid propellant instead of liquid fuel. OHB SE has been using TNSC 2008 to launch small European scientific and commercial satellites including GOCE and the first EDRS-A laser communications relay satellite. It has also been used to launch scientific spacecraft such as Akatsuki, UniBRAIN, and Astro-H. Larger Japanese national space agency (NASDA/ISAS) rockets such as H-IIA and H-IIB were launched from Tanegashima Space Center Site 2, however NASDA merged with ISAS in 2001 to form JAXA and all future launches of these rockets will take place at Uchinoura Space Center instead.