Waterloo is an unincorporated community in Kingman County, Kansas, United States.
The post office in Waterloo closed in 1912.
The community is served by Kingman–Norwich USD 331 public school district.
37°40′37″N 97°56′27″W / 37.67694°N 97.94083°W / 37.67694; -97.94083
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