64th meridian may refer to:

• 64th meridian east, a line of longitude east of the Greenwich Meridian
• 64th meridian west, a line of longitude west of the Greenwich Meridian

• 30th Golden Rooster Awards
• 30th Government of Ireland
• 30th Goya Awards
• 30th Guard Brigade "Michael the Brave"
• 30th Guards Mechanized Brigade (Ukraine)
• 30th Honor Guard Brigade (Romania)
• 30th House of Representatives of Puerto Rico
• 30th Illinois Volunteer Infantry Regiment
• 30th Infantry Division (2nd Formation)(People's Republic of China)
• 30th Infantry Division (Russian Empire)
• 30th Intelligence Squadron
• 30th International Film Festival of India
• 30th Japan Academy Prize
• 30th Lambda Literary Awards
• 30th Mechanized Corps (Soviet Union)
• 30th Metro Manila Film Festival
• 30th Midsouth Emmy Awards
• 30th National Geographic Bee
• 30th Naval Fighter Wing
• 30th Observation Squadron
• 30th Ontario Parliament
• 30th parliament of the United Kingdom
• 30th Parliament of the United Kingdom
• 30th PMPC Star Awards for Television
• 30th Reconnaissance Squadron (Fighter)