The parallel 36°30′ north is a circle of latitude that is 36 and one-half degrees north of the equator of the Earth. This parallel of latitude is very important in the history of the United States. This is because it was the line of the Missouri Compromise, which was used to divide the slave and free states west of the Mississippi River, with the exception of Missouri, which is mostly north of this parallel.

Around the world
Starting at the Prime Meridian and heading eastwards, the parallel 36°30′ north passes through:

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! scope="row" style="background:#b0e0e6;" | Mediterranean Sea
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! scope="row" style="background:#b0e0e6;" | Mediterranean Sea
| style="background:#b0e0e6;" | Passing just south of the island of Sicily, 
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| Mani Peninsula, island of Elafonisos and Cape Malea
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! scope="row" style="background:#b0e0e6;" | Aegean Sea
| style="background:#b0e0e6;" | Passing just south of the island of Folegandros,  Passing just north of the island of Santorini,  Passing just south of the island of Astypalaia, 
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| Island of Kandelioussa
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! scope="row" style="background:#b0e0e6;" | Aegean Sea
| style="background:#b0e0e6;" | Passing just south of the island of Nisyros,  Passing just north of the island of Tilos,  Passing just south of the island of Symi,  Passing just north of the island of Rhodes, 
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! scope="row" style="background:#b0e0e6;" | Mediterranean Sea
| style="background:#b0e0e6;" | Gulf of Antalya
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! scope="row" style="background:#b0e0e6;" | Mediterranean Sea
| style="background:#b0e0e6;" | Gulf of İskenderun
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| Khyber Pakhtunkhwa Gilgit-Baltistan – claimed by 
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| Xinjiang Qinghai – passing just south of Xining  Gansu Ningxia Gansu Shaanxi Shanxi Hebei Shandong 
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! scope="row" style="background:#b0e0e6;" | Yellow Sea
| style="background:#b0e0e6;" |Passing through Anmyeon Island,   Passing through Cheonsu Bay
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|South Chungcheong Province North Chungcheong Province - Passing through Mount Songni  North Gyeongsang Province
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! scope="row" style="background:#b0e0e6;" | Sea of Japan
| style="background:#b0e0e6;" | Passing just north of the island of Dōgo, 
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| Island of Honshū:– Ishikawa Prefecture– Toyama Prefecture– Nagano Prefecture– Gunma Prefecture– Tochigi Prefecture– Ibaraki Prefecture
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! scope="row" style="background:#b0e0e6;" | Pacific Ocean
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| California Nevada Arizona New Mexico Oklahoma / Texas border Oklahoma Missouri / Arkansas border Missouri Kentucky (Kentucky Bend) / Tennessee border (for about 5 km) Missouri (for about 5 km) Kentucky / Tennessee border Tennessee North Carolina
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! scope="row" style="background:#b0e0e6;" | Atlantic Ocean
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| Passing through Cádiz and Marbella
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! scope="row" style="background:#b0e0e6;" | Mediterranean Sea 
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n36°30′