Create Column by region with zips

Hi mnarveson ,

We can insert a custom column in power query as below.

Custom = if [Zip Code]>=90000 and [Zip Code]< 93599 then "Southern California" else if [Zip Code]>=94600 and [Zip Code] <=96199 then "Northern California" else "undefined"

Also please find the M code as below.

let
    Source = Csv.Document(File.Contents("D:\xxxx\xxxx\sel\data.csv"),[Delimiter=",", Columns=5, Encoding=65001, QuoteStyle=QuoteStyle.None]),
    #"Promoted Headers" = Table.PromoteHeaders(Source, [PromoteAllScalars=true]),
    #"Changed Type" = Table.TransformColumnTypes(#"Promoted Headers",{{"County", type text}, {"Place Name", type text}, {"State", type text}, {"State Abbreviation", type text}, {"Average of Zip Code", type number}}),
    #"Renamed Columns" = Table.RenameColumns(#"Changed Type",{{"Average of Zip Code", "Zip Code"}}),
    #"Added Custom" = Table.AddColumn(#"Renamed Columns", "Custom", each if [Zip Code]>=90000 and [Zip Code]< 93599 then "Southern California" else if [Zip Code]>=94600 and [Zip Code] <=96199 then "Northern California" else "undefined")
in
    #"Added Custom"

Please find the pbix as attached.

Regards,

Frank