ZIP code 20777: Highland, MD
ZIP code 20777 is in Highland (28% of residents) and Ashton-Sandy Spring (1.5%), in Howard County (99%) and Montgomery County (1.5%), Maryland. 71% of its residents live outside city limits. It is in Maryland's 3rd congressional district (99%) and Maryland's 8th congressional district (1.5%). Its state senate districts are State Senate District 13 (68%), State Senate District 9 (30%) and State Senate District 14 (1.5%); its state house districts are State Legislative District 13 (68%), State Legislative Subdistrict 9A (30%) and State Legislative District 14 (1.5%).
See it on the mapAll of Maryland
City and county
| City or town | Share of ZIP residents |
|---|---|
| Highland | 28% |
| Ashton-Sandy Spring | 1.5% |
| County | Share of ZIP residents |
|---|---|
| Howard County | 99% |
| Montgomery County | 1.5% |
| Town or county subdivision | Share of ZIP residents |
|---|---|
| District 5, Clarksville | 99% |
| District 8 | 1.5% |
Congressional districts
| Congressional district | Share of ZIP residents |
|---|---|
| Maryland's 3rd congressional district (MD-03) | 99% |
| Maryland's 8th congressional district (MD-08) | 1.5% |
This ZIP is split between districts. A mailing address in it could be in either; the map or locate_point gives the district for an exact address.
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MD-03) | Sarah Elfreth (D) | 202-225-4016 | 99% |
| U.S. Representative (MD-08) | Jamie Raskin (D) | 202-225-5341 | 1.5% |
| U.S. Senator | Angela D. Alsobrooks (D) | 202-224-4524 · contact form | statewide |
| U.S. Senator | Chris Van Hollen (D) | 202-224-4654 · contact form | statewide |
| State Senator (State Senate District 13) | Guy Guzzone (Democratic) | 68% | |
| State Senator (State Senate District 9) | Katie Hester (Democratic) | 30% | |
| State Senator (State Senate District 14) | Craig Zucker (Democratic) | 1.5% | |
| Delegate (State Legislative District 13) | Gabriel Moreno (Democratic) | 68% | |
| Delegate (State Legislative District 13) | Jen Terrasa (Democratic) | 68% | |
| Delegate (State Legislative District 13) | Pam Guzzone (Democratic) | 68% | |
| Delegate (State Legislative Subdistrict 9A) | Chao Wu (Democratic) | 30% | |
| Delegate (State Legislative Subdistrict 9A) | Natalie Ziegler (Democratic) | 30% | |
| Delegate (State Legislative District 14) | Anne Kaiser (Democratic) | 1.5% | |
| Delegate (State Legislative District 14) | Bernice Mireku-North (Democratic) | 1.5% | |
| Delegate (State Legislative District 14) | Pam Queen (Democratic) | 1.5% |
Officials serving now (members of Congress until January 3, 2027). Sources: State legislators: Open States (public domain); Members of Congress: the @unitedstates project, congress-legislators (CC0).
Local government
- Highland laws: search for the Highland, Maryland code of ordinances
- Ashton-Sandy Spring laws: search for the Ashton-Sandy Spring, Maryland code of ordinances
- Howard County website: https://www.howardcountymd.gov/
- Howard County laws: search for the Howard County, Maryland code of ordinances
- Montgomery County website: https://www.montgomerycountymd.gov/
- Montgomery County laws: search for the Montgomery County, Maryland code of ordinances
State legislative districts
| State senate district | Share of ZIP residents |
|---|---|
| State Senate District 13 | 68% |
| State Senate District 9 | 30% |
| State Senate District 14 | 1.5% |
| State house district | Share of ZIP residents |
|---|---|
| State Legislative District 13 | 68% |
| State Legislative Subdistrict 9A | 30% |
| State Legislative District 14 | 1.5% |
Voting precincts
6 voting precincts overlap ZIP 20777. Map them, with each precinct's share of the ZIP's residents.
Get this in your AI agent
Your agent can get these cities, counties, districts and precincts with their shares, and their GeoJSON boundaries, from Boundary Atlas. Add https://atlas-production-d344.up.railway.app/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:zcta:20777")
ZIP 20777 here is the Census Bureau's ZIP Code Tabulation Area, which approximates the USPS ZIP Code; PO-box-only ZIPs have none. Districts are the maps in force for the November 3, 2026 election.