Nettle Lake is an unincorporated community and census-designated place (CDP) in Williams County, Ohio, United States, around the south end of the lake of the same name. It was first listed as a CDP following the 2010 census.^[2]

Nettle Lake, Ohio
Census-designated place
Nettle Lake Show map of Ohio Nettle Lake Show map of the United States
Coordinates: 41°40′43″N 84°43′37″W / 41.67861°N 84.72694°W / 41.67861; -84.72694
Country	United States
State	Ohio
County	Williams
Township	Northwest
Area [1]
• Total	0.37 sq mi (0.95 km2)
• Land	0.26 sq mi (0.66 km2)
• Water	0.11 sq mi (0.29 km2)
Elevation [2]	942 ft (287 m)
Population  (2020)
• Total	210
• Density	823.53/sq mi (318.48/km2)
Time zone	UTC-5 (Eastern (EST))
• Summer (DST)	UTC-4 (EDT)
ZIP Code	43543 (Montpelier)
Area code(s)	419/567
FIPS code	39-53914
GNIS feature ID	2628938[2]

The CDP is in the northwest corner of Ohio, in the northern part of Williams County's Northwest Township. It is 1 mile (1.6 km) south of the Michigan border, 4 miles (6 km) east of the Indiana border, and 13 miles (21 km) northwest of Montpelier, Ohio. Nettle Lake drains out of its northern end into Nettle Creek, which flows southeast to the St. Joseph River, a southwest-flowing major tributary of the Maumee River, which flows northeast to Lake Erie at Toledo.