Where every number comes from.
Everything on the district and area pages is public record. This page lists each source, what was taken from it, and when. If you find a number that looks wrong, email me and I will check it against the source and fix it.
The district boundary and the streets
City of Alhambra GIS: the official council district map (District 1 polygon) and street centerlines. Used for the map on the district page and to check each letter's address. The four areas within the district follow U.S. Census tract lines, not City lines.
People, homes, and density
U.S. Census Bureau, 2020 Census (P1 total population, H1 housing units) and TIGER/Line tract boundaries, for tracts 4803.04 (Area A), 4804 (B), 4803.02 (C), and 4810.02 (D), retrieved from the Bureau's 2020 P.L. 94-171 file on September 23, 2026. Three of the four tracts extend past the district line, so their counts include some neighbors just outside District 1. Measured against the City's district polygon, the share of each tract's land inside District 1 is about 75 percent for A (the rest is south of Main Street), 69 percent for B (west of Atlantic Boulevard), 99 percent for C, and 73 percent for D (south of the district line). Land area is from TIGER/Line, and density is people divided by land area, rounded.
The district page's "about 16,500 people" and the inside-the-line counts on each area page come from the same file at the Census block level: the 2020 P.L. 94-171 Redistricting Data Summary File for California (tables P1 and H1), retrieved from the Census Bureau on September 23, 2026, summed over the blocks the Statewide Database crosswalk assigns to District 1's three 2022 precincts. That count is 16,496 people and 7,076 housing units, including about 625 people in the sliver of tract 4810.01.
Percentages and medians on the area pages
U.S. Census Bureau, American Community Survey, ACS 2024 five-year estimates (2020 to 2024), for the same four tracts and for the City of Alhambra. Retrieved September 23, 2026 through the Census Reporter API (censusreporter.org), which serves the Bureau's published tables unchanged. District 1 figures are the four tracts added together. Tables used:
| Table | What it covers |
|---|---|
| B01001 | Sex by age |
| B01002 | Median age |
| B25003 | Tenure (owner or renter) |
| B25038 | Tenure by year householder moved in |
| B25034 | Year structure built |
| B25024 | Units in structure |
| B25064 | Median gross rent |
| B25077 | Median value, owner-occupied units |
| B19013 | Median household income |
| B25010 | Average household size |
| B05002 | Place of birth by nativity and citizenship |
| B05003 | Sex by age by nativity and citizenship status |
| B08301 | Means of transportation to work |
| B08201 | Household size by vehicles available |
| B15003 | Educational attainment, age 25 and over |
| B25002 | Occupancy status |
| C16001 | Language spoken at home by ability to speak English, age 5 and over |
| B16005 | Nativity by language spoken at home by ability to speak English |
Margins of error. The ACS is a survey, and at the tract level its estimates carry wide margins. Medians on the area pages show the Bureau's published 90 percent margin of error as a plus-or-minus. Percentages are rounded to the whole number and are best read as "about," so a gap of a few points between two areas usually means nothing. Where an estimate is under 3 percent it is shown but should be treated as "very few."
The 2022 election
City of Alhambra, certified results of the General Municipal Election, November 8, 2022, City Council District 1. Vote counts and the margin are as certified. Turnout as a share of population divides certified votes by the 2020 Census count for the four tracts and is approximate.
Registration, ballots, and precinct results by area
Statewide Database, University of California, Berkeley (statewidedatabase.org), 2022 General Election files for Los Angeles County, retrieved September 23, 2026: registration by 2020 Census block, vote-by-mail and polling-place voters by 2020 Census block, local city contest results by precinct, and the precinct-to-block crosswalk. The Statewide Database builds these from the County's official voter file and certified results. District 1 blocks are the 2020 Census blocks the crosswalk assigns to the three precincts that carried District 1 council votes, not an independent overlay of the official district polygon; where the crosswalk splits a block between precincts, its fractional weight is applied. Registered voters and ballots on each area page are those block totals summed by Census tract. Turnout is ballots divided by registration. District 1 totals include a small set of District 1 blocks in a fifth tract, 4810.01, that lies outside the four areas. Where a precinct crosses an area line, its share is estimated by the ballots cast in each block. Candidate votes are shown by precinct, not by area, because the precincts do not follow the area lines.
History
City of Alhambra, Historic Context Statement, final version dated April 13, 2022, and Citywide Historic Resources Survey Report, November 2023, both prepared for the City's Community Development Department by Historic Resources Group as part of the Historic Preservation Program. Every historical statement on the area pages carries a bracketed citation to one of these two documents, by PDF page number. The context statement's own sources, chiefly Margaret Lee's history of Alhambra, the Los Angeles Times, and County map books, are cited in its footnotes. Where a house is named, it is because the City's survey names it; addresses of private homes are given by block. The survey's "eligible" findings are the consultants' evaluations, not designations.
On the City's docket
City of Alhambra, Community Development Department, Development Projects pages (Proposed, Under Appeal, Approved, Under Construction), checked September 23, 2026. Each project's description is condensed from the City's own project page, which is linked. Projects are placed in an area by geocoding the City's address and checking it against the area boundaries. Completed projects are not listed. The list is refreshed by hand, and the check date is shown wherever it appears.
Places
Parks, schools, and public buildings on the area pages were located with OpenStreetMap and then checked against the operator's own published address (for schools, Alhambra Unified School District) and placed inside the district and area boundaries by coordinate. Anything that could not be confirmed both ways was left off. Almansor Park, which gives Area D's neighborhood its name, sits just south of the district line and so is not listed inside it.
Neighborhood names
The names on the area cards (Atlantic-Garfield-Main, Bean Tract, Story Park and Alhambra Tract, Almansor Park and East Beacon Street) are the names Nextdoor uses for these neighborhoods, matched to the tracts by their described boundaries.
Letter counts
Letter counts and "writing about most" lines update live from this site's own database, count only letters with a verified District 1 address, and never include names, addresses, or letter text.