99chambers

Maryland House of Delegates seat · lines in effect since 2022

Maryland Delegate District 9A

A district of about 87,000 people, 23% Asian, 66% of adults with a bachelor's degree. It votes D+21.0 relative to the nation for president.

Chao Wu (D) · since Nov 8, 2022Natalie Ziegler (D) · since Nov 8, 2022Next election Nov 5, 2030The 2026 race →

Where it sits among all 71 seats

Every Maryland House of Delegates seat by partisan lean, from most Democratic to most Republican. Lean is the seat's presidential vote on current lines, relative to the nation.

D+21.041st most
Democratic
Most DemocraticMost Republican36th seat · the majority lineDistrict 9A

Source: 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Every race on these lines

Results recomputed from precinct returns as if today's boundaries had always existed, so years compare like for like.

2022
Maryland House of DelegatesD+0.3

Outlined: the race for this seat itselfBlank: no race that year

Source: 99chambers results archive: precinct results allocated to current lines; 2026: civicAPIUpdated Nov 7, 2026, 3:01 PM ET

Who lives here, compared

Grey bars show the spread of all 71 seats. Small marks are other seats in Maryland. The black marker is District 9A.

Adults with a bachelor's degree66% 96th pct · 4th of 71 in MD

Higher than 96% of seats.

White adults without a degree19% 43rd pct · 41st of 71 in MD

Lower than 57% of seats.

Hispanic residents8% 49th pct · 37th of 71 in MD

Lower than 51% of seats.

Black residents8% 19th pct · 58th of 71 in MD

Lower than 81% of seats.

Asian residents23% 97th pct · 3rd of 71 in MD

Higher than 97% of seats.

People per square mile516 36th pct · 46th of 71 in MD

Less dense than 64% of seats.

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current linesUpdated Oct 13, 2026, 5:06 AM ET

Seats most like this one

Nearest seats on demographics, density and lean.

District 15
68% college gradsD+47.5CountingDistrict 9B
70% college gradsD+42.9Held DDistrict 13
28% Black · 61% college gradsD+52.6CountingDistrict 14
28% Black · 57% college gradsD+46.0Held D

Source: Census Bureau, American Community Survey 2020–2024 5-year estimates, allocated to current lines; 99chambers: 2024 and 2020 presidential results on current lines, relative to the nation (2024 weighted 3:1)Updated Oct 16, 2026, 5:19 AM ET

Who has held it

These lines took effect in 2022.

  1. Natalie Ziegler (D)
    2023– · Won 2022 by 0.8
  2. Chao Wu (D)
    2023– · Won 2022 by 0.3

Source: Past results: 99chambers results archive (MEDSL, Klarner, state election offices)