Rio del Mar in pictures
Census counts: 7,067 in 1980, 9,128 in 2020. The archive holds 5 old photos and papers going back to 2014 and 6 maps from 1912 on.
Explore the history →Each edition grades its towns against each other only.

Some 9,201 people live in this town, in California.
Strong in places, weak in others. Its weakest subject is cost of living (D−): the typical home is worth about $1.3 million, 12 years of the Santa Cruz metro’s $111K median household income. With a C+ overall, Rio del Mar sits 326th of 841 in California. It comes out better than 36% of U.S. towns. Health is its strong suit — CDC estimates put its residents' health ahead of 94% of the country. Hazard risk is weaker too: FEMA rates its natural-hazard risk higher than 86% of U.S. communities, with earthquakes at the top. The biggest park or preserve is Monterey Bay National Marine Sanctuary, at 967 acres. Nearly two thirds of adults 25 and older hold a bachelor’s degree or more in the town, above both the California town median (29%) and the median of U.S. towns (29%).
Figures: health, CDC PLACES · home values, Zillow · incomes, Census ACS, 2020–24 · FEMA National Risk Index · OpenStreetMap.
Where Rio del Mar beats most towns, and one thing worth knowing.
| Widest gap | Rio del Mar | CA |
|---|---|---|
| Fewer uninsured adults | 3.9% | 10.6% |
Where Rio del Mar’s working residents go each day. Line width shows the share.
Census LEHD 2023
Each subject compared with towns across the country (schools within California), ordered by how far Rio del Mar is from typical.
How TownRatings grades towns →
Census counts: 7,067 in 1980, 9,128 in 2020. The archive holds 5 old photos and papers going back to 2014 and 6 maps from 1912 on.
Explore the history →Museums, parks, gardens and other places to visit around Rio del Mar. Close and well known come first.
Big draw31 mi Stadium & arenaLevi's Stadium
Big draw31 mi Theme parkCalifornia's Great America
24 mi Zoo & aquariumMonterey Bay Aquarium
26 mi Stadium & arenaSAP Center
7 mi Theme parkSanta Cruz Beach Boardwalk
25 mi MuseumMonterey Museum of ArtLevi's Stadium: Matthew Roth, CC BY-SA 2.0 · California's Great America: Oleg Alexandrov, CC BY-SA 4.0 · Monterey Bay Aquarium: Meij.kobayashi, Public domain · SAP Center: Dicklyon, CC BY-SA 4.0 · Santa Cruz Beach Boardwalk: Josta Photo, CC BY 2.0 · Monterey Museum of Art: Sgerbic, CC BY-SA 4.0
Rio del Mar is unincorporated, so Santa Cruz County and regional agencies provide most services.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Nov 18, 2024.
Ordered by what stands out in Rio del Mar.
Rio del Mar is a second-home town and has a longer frost-free season than nearly all U.S. towns, but it has homes that cost more against local pay than most of California.
Against the 2,181 U.S. towns with household incomes like Rio del Mar’s, it is healthier than 67%, a smaller edge than it has nationally: part of it comes with its incomes.
Rio del Mar: 24% of adults have obesity. For adults locally, the share who sleep under 7 hours is 29%.
| Rio del Mar | California towns | U.S. towns | |
|---|---|---|---|
| Sleep under 7 hours (CDC PLACES) | 29% | 35% | 36% |
| Obesity (CDC PLACES) | 24% | 29% | 35% |
| Frequent mental distress (CDC PLACES) | 14% | 17% | 17% |
| Get no exercise (CDC PLACES) | 16% | 24% | 25% |
| What stands out | Rio del Mar | CA |
|---|---|---|
| Fewer uninsured adults | 3.9% | 10.6% |
| Fewer adults facing food insecurity | 6.6% | 17.9% |
| More adults who have had cancer | 11.4% | 6.4% |
CDC PLACES 2025 · modeled estimates for adults · CMS · HRSA
One of its 2 schools is below, with the reason it’s listed. The Pajaro Valley Unified school district runs its public schools. Enrollment at Rio del Mar’s public school: 393 students.
| School | Level | Students | Letter |
|---|---|---|---|
| Rio del Mar ElementaryLargest public elementary schoolGrades K–6 | Grades K–6 | 393 | – |
NCES · EDFacts · graded within CA on state tests and graduation
Flood insurance has paid out on 29 claims in Rio del Mar since 1983. FEMA puts 59% of the town’s expected hazard losses down to earthquakes, and 31% to inland flooding.
FEMA flood insurance claims · FEMA National Risk Index · OpenFEMA
30.2% of workers work from home, against 17.2% across California.
The top destinations are Santa Cruz (10%), Watsonville (9%) and San Jose (7%). For Rio del Mar, the middle household income is $160,000. Jobs in Rio del Mar grew by 167 from 2013 to 2023, reaching 1,263. Most working residents leave Rio del Mar for work: only 6% work in town.
| Rio del Mar | California towns | U.S. towns | |
|---|---|---|---|
| Median household income | $160,000 | $95,000 | $80,000 |
| Below the poverty line | 2.3% | 10% | 9.6% |
| Average trip to work | 30 minutes | 28 minutes | 25 minutes |
Census LEHD 2023 · ACS
The Santa Cruz weather station, 7 miles away, records that the frost-free season runs about 323 days, longer than in 96% of U.S. towns. January nights average 41.7°, milder than in 95% of U.S. towns; July afternoons average 72°.
The midsummer high for Rio del Mar comes to 72°F. Snow almost never falls.
| Rio del Mar | California towns | U.S. towns | |
|---|---|---|---|
| July high | 72°F | 89°F | 85°F |
| January low | 42°F | 40°F | 22°F |
NOAA U.S. Climate Normals, 1991–2020
Across 7 parks and preserves: 2.0 miles of trail. Rio del Mar’s concentration of trails is 0.4 miles per square mile.
| Biggest places to walk | Trails | Acres |
|---|---|---|
| 1. Seascape Park | 0.7 mi | 7 |
| 2. Monterey Bay National Marine Sanctuary | — | 967 |
| 3. Seascape Uplands Preserve | — | 135 |
Trails & parks © OpenStreetMap contributors · Conserved land: USGS PAD-US
At 12 years of the Santa Cruz metro’s $111K median household income, the typical home costs more against local pay than in 86% of California towns; that ratio is one input to its D− for cost of living. The median property tax bill is $8,403, against $5,124 across California, another input to its cost-of-living grade.
The going rate for rent in Rio del Mar is $3,407 a month. In Rio del Mar, 75% of households own their home. Homes sold in Rio del Mar spent a median 40 days on the market.
| Rio del Mar | California towns | U.S. towns | |
|---|---|---|---|
| Median rent | $3,407 a month | $1,895 a month | $1,185 a month |
| Households that own their home | 75% | 64% | 73% |
Census ACS, 2020–24 · Zillow Home Value Index · Redfin Data Center
3 within 15 miles of the center of Rio del Mar
About 6 of every 100 Rio del Mar residents are enrolled in college, against 8 across California.
Place in California, United States
Rio del Mar (Spanish: Río del Mar, meaning "River of the Sea") is an unincorporated village in Santa Cruz County, California, United States. Rio del Mar is one of several small villages that form the unincorporated community of Aptos. Its population was 9,128 as of the 2020 United States census. For statistical purposes, the United States Census Bureau has defined Rio del Mar as a census-designated place (CDP).
From Wikipedia, licensed CC BY-SA 4.0 · facts via Wikidata (CC0)
3 towns share a border with Rio del Mar.
| Town | CA rank | Overall | Cost | Safety | Schools | Health |
|---|---|---|---|---|---|---|
| Rio del Mar | #326 | C+ | D− | — | C | A |
| La Selva Beach | — | — | D− | — | C | B |
| Seacliff | #350 | C | D− | — | C | A |
| Aptos | #260 | C+ | D | — | C | A |
La Selva Beach has fewer than 2,500 residents, so it gets subject grades but no overall grade. Rio del Mar, La Selva Beach, Seacliff and Aptos report no FBI crime data of their own. Compare Rio del Mar with a neighbor →
Short answers, built from the data on this page.
Rio del Mar grades C+ overall, better than 36% of U.S. towns and #326 of 841 in California. It grades A for health and C for schools. Cost of living is its weak spot, with a D−.
Yes. The typical home is worth about $1,338,000, 76% above the California typical home. Cost of living, which also weighs rents, property taxes and how many households pay 30% or more of their income for housing, grades D−.