Line 9

Line 9 or 9 Line may refer to:

China

 * Line 9 (Beijing Subway), a subway line in Beijing
 * Line 9 (Chengdu Metro), a metro line in Chengdu, Sichuan
 * Line 9 (Chongqing Rail Transit), a metro line in Chongqing
 * Line 9 (Guangzhou Metro), a metro line in Guangzhou, Guangdong
 * Line 9 (Hangzhou Metro), a metro line in Hangzhou, Zhejiang
 * Line 9 (Shanghai Metro), a metro line in Shanghai
 * Line 9 (Shenyang Metro), a metro line in Shenyang, Liaoning
 * Line 9 (Shenzhen Metro), a metro line in Shenzhen, Guangdong
 * Line 9 (Tianjin Metro), a metro line in Tianjin
 * Line 9 (Xi'an Metro), a metro line in Xi'an, Shaanxi

India

 * Line 9 (Mumbai Metro)

Malaysia

 * Sungai Buloh-Kajang Line, called Line 9 at route map

Philippines

 * Metro Manila Subway Line 9, Metro Manila

South Korea

 * Seoul Subway Line 9, a subway line in Seoul

France

 * Paris Métro Line 9, one of 16 metro lines in Paris

Italy

 * Line 9 (Naples Metro), rapid transit railway line that forms part of the Metropolitana di Napoli

Russia

 * Line 9 (Moscow Metro), a metro line of the Moscow Metro, Moscow

Spain

 * Barcelona Metro line 9, one of the two branches of the Barcelona metro extension line 9/10
 * Line 9 (Madrid Metro)

Mexico

 * Mexico City Metro Line 9, a rapid transit line in Mexico City

United States

 * 9 (New York City Subway service)
 * Route 9 (Baltimore), a bus route
 * 9 (Los Angeles Railway)

Brazil

 * Line 9 (CPTM), São Paulo

Chile

 * Santiago Metro Line 9, a planned railway line

Australia

 * T9 Northern Line, Sydney Trains service