Timonium, Maryland
Timonium is a Census-designated place (an unincorporated community) in Baltimore County, Maryland, with 10,458 residents in 2020. It is in Maryland's 2nd congressional district. It spans 2 state senate and 3 state house districts.
County
| County | Share of residents |
|---|---|
| Baltimore County | 100% |
Congressional district
| Congressional district | Share of residents |
|---|---|
| Maryland's 2nd congressional district (MD-02) | 100% |
Elected officials
| Office | Member | Contact | Share of residents |
|---|---|---|---|
| U.S. Representative (MD-02) | Johnny Olszewski, Jr. (D) | 202-225-3061 | 100% |
| 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 42) | Chris West (R) | 97% | |
| State Senator (State Senate District 11) | Shelly Hettleman (Democratic) | 3.3% | |
| Delegate (State Legislative Subdistrict 42B) | Michele Guyton (Democratic) | 91% | |
| Delegate (State Legislative Subdistrict 42A) | Alex Harlan (R) | 6.0% | |
| Delegate (State Legislative Subdistrict 11B) | Dana Stein (Democratic) | 3.3% | |
| Delegate (State Legislative Subdistrict 11B) | Jon Cardin (Democratic) | 3.3% |
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
- Timonium laws: search for the Timonium, Maryland code of ordinances
- Baltimore County website: https://www.baltimorecountymd.gov/
- Baltimore County laws: search for the Baltimore County, Maryland code of ordinances
State legislative districts
| State senate district | Share of residents |
|---|---|
| State Senate District 42 | 97% |
| State Senate District 11 | 3.3% |
| State house district | Share of residents |
|---|---|
| State Legislative Subdistrict 42B | 91% |
| State Legislative Subdistrict 42A | 6.0% |
| State Legislative Subdistrict 11B | 3.3% |
ZIP codes
Percentages mark ZIPs only partly in Timonium: the share of that ZIP's residents living in it.
- 21093 (27%)
Get this in your AI agent
Your agent can get Timonium's counties and districts with shares, its ZIP codes (level='zcta'), and its boundary as GeoJSON (get_boundaries). Add https://boundarymcp.com/mcp to Claude, ChatGPT, Cursor or Codex (free, no key; how), then:
related_geographies(id="us:place:2478050")
Timonium here is the Census Bureau's place boundary as of January 1, 2025 (a Census-designated place, which has no municipal government). Shares are of 2020 Census population. Districts are the maps in force for the November 3, 2026 election.