諾克斯縣 (密蘇里州)

{{Infobox U.S. county
| state = Missouri
| county = Knox County
| county_zh = 諾克斯縣
| seal =
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| founded = 1745
| named for =
| seat = Edina
| largest city =
| largest city wl =
| area_total_km2 = 1,313 km² (507 mi²)
| area_total_sq_mi =
| area_land_km2 = 1,310 km² (506 mi²)
| area_land_sq_mi =
| area_water_km2 = 3 km² (1 mi²)
| area_water_sq_mi =
| area percentage = 0.21%
| census yr = 2000
| census estimate yr =
| pop = 4,361
| population_density_km2 = 3
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| coordinates = {{coord|{}|0|N|{}|0|W|type:adm2nd|display=title,inline}}
}}
諾克斯縣（）是美國密蘇里州東北部的一個縣。面積1,313平方公里。根據美國2000年人口普查，共有人口4,361人。縣治伊代納（Edina）。

成立於1845年2月14日，縣名是紀念美國首任亨利·諾克斯（Henry Knox）。