County District and School Map
The map is downloaded from https://data.howardcountymd.gov/MapGallery.html.
Please download the PDF file below which has a very high resolution for you to see details.
Or you can search and find your council district number by entering your street address: https://data.howardcountymd.gov/DataExplorer/Search.aspx?Application=CouncilMember
High School Location by District
Note: Some high schools have students from several council districts. I just searched by the school address.
District 1: Centennial High
District 2: Howard High, Oakland Mill High, Long Reach High High
District 3: Hammond High, High School 13 (Jessup?)
District 4: Atholton High, Wilde Lake High, River Hill High, Reservoir High
District 5: Mount Hebron High, Glenelg High, Marriotts Ridge High
HoCo School Map
The HCPSS link for the map above is http://www.hcpss.org/f/contact/map_schools.pdf