Maryland
A dated list of changes to how Americans vote: district maps, polling places and drop boxes, voting laws and rules, and courts and election officials. Each entry says who did what and when, shows what became of it, and links to the page it rests on. Attempts that failed are listed as failed. Entries that rest on a news report name the outlet.
This is the state view: events recorded for Maryland, then national events that apply here. See the national timeline.
In Maryland
2026
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House passes a new congressional map (HB 488); the Senate does not vote on it
House Bill 488 (2026), "Election Districts - General Assembly and Representatives in Congress," would have altered Maryland's congressional districts for the 2026 elections. The House passed it on February 2, 2026 by 99-37 and it was referred to the Senate Rules Committee on February 4. The legislature's record shows no later action, and the Regular Session ran January 14 to April 13, 2026.
- Maryland General Assembly: HB 488 (2026 Regular Session), legislative history ↗
- Maryland State Archives: Maryland General Assembly, 2026 sessions ↗
Source last checked Oct 20, 2026
2025
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Governor Moore creates the Governor's Redistricting Advisory Commission to consider mid-cycle redistricting
On November 4, 2025 Governor Wes Moore announced the creation of the Governor's Redistricting Advisory Commission "to consider mid-cycle redistricting," to hold public hearings and make recommendations to the Governor and General Assembly. The release names Senator Angela Alsobrooks as chair, with former Attorney General Brian Frosh and Cumberland Mayor Ray Morriss as the other gubernatorial appointees, plus the presiding officers of the General Assembly or their designees.
Source last checked Oct 20, 2026
2022
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Governor approves a replacement congressional districting plan (Chapter 16 of 2022)
Senate Bill 1012 (2022), the Congressional Districting Plan, established the composition of Maryland's eight congressional districts. The General Assembly's record shows it was approved by the Governor on April 4, 2022 as Chapter 16.
Source last checked Oct 20, 2026
2021
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General Assembly overrides the Governor's veto of the 2021 congressional districting plan
House Bill 1 of the 2021 Special Session, the Congressional Districting Plan, was vetoed by the Governor on December 9, 2021. The House overrode the veto 96-42 and the Senate 32-14 the same day, and it became Chapter 32.
Source last checked Oct 20, 2026
2012
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Voters approve the congressional districting plan at a statewide referendum (Question 5)
The 2011 congressional districting plan was petitioned to a statewide referendum and appeared as Question 5 on the November 2012 ballot. The State Board of Elections' official results show 1,549,511 votes (64.1%) for the referred law and 869,568 (35.9%) against.
- Maryland State Board of Elections: 2012 Presidential General Election results, state questions ↗
- Maryland State Board of Elections: Question 5 summary, Congressional Districting Plan (Ch. 1 of the 2011 Special Session) ↗
- Maryland State Board of Elections: 2012 Presidential Election Calendar (General Election - November 6, 2012) ↗
Source last checked Oct 21, 2026
2011
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Governor signs the 2011 congressional districting plan (Chapter 1 of the 2011 Special Session)
Senate Bill 1 of the 2011 Special Session established the composition of Maryland's eight congressional districts based on the 2010 Census. The chapter law records: "Approved by the Governor, October 20, 2011."
Source last checked Oct 20, 2026
Nationwide
2026
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Census Bureau proposes residence criteria for the 2030 census that would exclude some noncitizens from the apportionment count
On September 10, 2026 the Census Bureau, an agency of the Department of Commerce, published a proposed rule in the Federal Register (91 FR 57524, Docket No. 260903-0005, RIN 0607-AA75) that would add two new parts to the Code of Federal Regulations: residence criteria for the decennial census, and standards and restrictions for demographic questions on the census questionnaire. On residence, the notice states that "the Census Bureau proposes to include lawful permanent residents within the apportionment base, while excluding from the apportionment base illegal aliens and aliens whose legal status is less durable and indefinite in length than lawful permanent resident status," and says it is considering using administrative records to determine legal status. The comment period, first set to end October 13, 2026, was extended to November 2, 2026 by a notice published October 5, 2026. Al Jazeera and CNBC reported on the proposal, and CNBC reported that opponents expect litigation.
- Decennial Census of the Population of Americans; Proposed Residence Criteria and Proposed Regulations for Demographic Questions, 91 Fed. Reg. 57524 (Sept. 10, 2026) (GovInfo) ↗
- Same proposed rule, extension of comment period, 91 Fed. Reg. 63207 (Oct. 5, 2026) (GovInfo) ↗
- Trump administration proposes excluding certain immigrants from US census (September 10, 2026) ↗ News report, Al Jazeera
- CNBC report on the proposed 2030 census rule (October 13, 2026) ↗ News report, CNBC
Source last checked Oct 22, 2026
2021
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Census Bureau releases 2020 redistricting data for states
On August 12, 2021, the Census Bureau released the 2020 Census Redistricting Data (Public Law 94-171) Summary File, which it described as delivering data for states to begin redistricting. On September 16, 2021, it released the same data in an easier-to-use format on data.census.gov and delivered a toolkit to states.
- Census Bureau press release CB21-CN.55, August 12, 2021 ↗
- Census Bureau press release CB21-CN.63, September 16, 2021 ↗
Source last checked Oct 22, 2026
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Census Bureau announces 2020 Census apportionment results
On April 26, 2021, the Census Bureau announced that the 2020 Census resident population of the United States on April 1, 2020 was 331,449,281, and that Commerce Secretary Gina Raimondo delivered the population counts used for apportionment of the U.S. House to the President.
Source last checked Oct 20, 2026
1967
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Congress requires single-member congressional districts (Public Law 90-196)
Public Law 90-196, approved December 14, 1967, provides that in each state entitled to more than one Representative "there shall be established by law a number of districts equal to the number of Representatives to which such State is so entitled," with "no district to elect more than one Representative."
Source last checked Oct 20, 2026
How this timeline is built
Every entry rests on at least one source that was opened and read, and that source states the date and the fact. Courts, legislatures, election offices, the Justice Department, the Census Bureau, the Federal Register and Congress.gov come first. A news report is used only when no official page states the fact, and it is labeled with the outlet's name. Encyclopedias are not used as sources. History starts in 1965 with the Voting Rights Act. County names come from the Census Bureau's 2024 Gazetteer. Congressional district numbers are those in use for the 2026 election; an event is tagged to a district only when its source names that congressional district.
When a later event changes an earlier one, such as a law later struck down, both entries are listed and point to each other. This page does not predict outcomes or say which party a change helps. U.S. House maps for 2026 · Back to the 2026 voting center.