September 2026 Congressional District
California's 4th Congressional District (CA-4), September 2026 edition
All districts / CA-4
Mike Thompson
In September 2026, California's 4th Congressional District (CA-4) had a median household renter margin of -$1,170.19 per month. The national median household renter margin for September 2026 was -$965.14 per month. Rank 255 of 435 districts for the median household income group, using the average of renter and blended-owner margins (rank 1 is best).
This is the September 2026 published edition for California's 4th Congressional District (CA-4). It preserves the figures, methodology version, and source record available for that edition. When you quote or cite these figures, name the edition month so readers can find this exact archived copy.
The standing district page follows the newest published edition. View the latest version for CA-4. Use this dated edition when checking a historical report or comparing months.
Two adults: monthly margin by housing path
Rank 240 of 435. Take-home pay minus required costs; rank 1 is the highest. Every group is in the table below.
- Renter-$2,285.09 Lowest
- Homeowner (median cost)-$1,470.31
- Homeowner with mortgage-$2,219.31
- Mortgage paid off-$211.31 Highest
These are modeled required costs at current market prices, not your actual bills. How we measure
| Income group | Net income | Margin · Renter | Margin · Homeowner (median cost) | Margin · Homeowner with Mortgage | Margin · Homeowner, Mortgage Paid Off | Rank |
|---|---|---|---|---|---|---|
| One adult | $3,456.89 | -$3,006.83 Lowest | -$2,192.05 | -$2,941.05 | -$933.05 Highest | 369 of 435 |
| Two adults | $6,913.76 | -$2,285.09 Lowest | -$1,470.31 | -$2,219.31 | -$211.31 Highest | 240 of 435 |
| Median household | $6,030.53 | -$1,170.19 Lowest | -$355.41 | -$1,104.41 | +$903.59 Highest | 255 of 435 |
| Senior 65+ | $5,500.93 | -$428.69 Lowest | +$386.09 | -$362.91 | +$1,645.09 Highest | 190 of 435 |
| Senior couple 65+ See the note under the table. | $7,876.12 | -$254.53 Lowest | +$560.25 | -$188.75 | +$1,819.25 Highest | 155 of 435 |
| Social Security | $2,088.79 | -$3,840.63 Lowest | -$3,026.35 | -$3,775.35 | -$1,767.35 Highest | 377 of 435 |
| Two Social Security See the note under the table. | $3,208.00 | -$4,920.69 Lowest | -$4,106.41 | -$4,855.41 | -$2,847.41 Highest | 387 of 435 |
The Social Security row uses the SSA average retired-worker benefit. The Senior couple 65+ row uses Census household income for householders 65 and older, scaled to two-or-more-person senior households using the stated ACS and PUMS sources. The Two Social Security row uses the Social Security Administration published aged-couple average benefit. Neither row doubles a one-person figure.
Find a district by ZIP
This lookup uses the federal list that matches ZIP codes to congressional districts (2026 Q1). If a ZIP code is not on the list, we do not guess. The map uses Census ZIP areas, so the two may differ slightly.
California's 4th Congressional District (CA-4) on the map
Net monthly income minus required costs equals the monthly margin. Where rankings appear, they are produced by the same formula for all 435 districts, never by editorial selection. Ranks compare each income group across all 435 districts using the average of the group’s own renter and blended-owner margins after each margin is rounded to whole dollars; rank 1 is the highest average. All seven household groups are ranked separately. Tied places are listed alphabetically by state name, then by district number. The basket is a market-price standard: current asking rent and unsubsidized average marketplace premiums. It can run above what a settled household pays, and the methodology states this. The market-rent line is the one non-federal input, the Zillow Observed Rent Index, labeled wherever it appears. Each report uses the newest Zillow rent release available when it is built, and the report names the Zillow data month. Rent data: Data Provided by Zillow Group. See the methodology for sources, definitions, and calculation rules. Figures from values 8baab6e146a3bfc1c41c6cf1857224b9223bea4cb64e496bb712ed00b3618e84 · build 048ae30f.
Looking for an earlier month? See past reports or download a PDF.
ZIP codes in this district
94503, 94508, 94512, 94515, 94534, 94558, 94559, 94567, 94571, 94573, 94574, 94576, 94581, 94585, 94599, 94927, 94928, 94931, 94951, 94952, 94954, 95229, 95309, 95401, 95403, 95404, 95405, 95407, 95409, 95422, 95423, 95426, 95433, 95435, 95442, 95443, 95451, 95452, 95453, 95457, 95458, 95461, 95464, 95467, 95469, 95472, 95476, 95482, 95485, 95493, 95606, 95607, 95612, 95613, 95615, 95616, 95617, 95618, 95620, 95627, 95637, 95645, 95687, 95688, 95690, 95691, 95694, 95695, 95696, 95697, 95776, 95912, 96120, 96143, 96150, 96151, 96161
Other CA districts
Compare margins in the same state, or browse all 435 districts.
All 435 districts, as one file your AI can read. Get the AI Companion.
Public data files, no email needed: Public data.