The short answer: Rossmoor is an unincorporated, almost entirely single-family community of about 3,500 homes; Seal Beach is an incorporated beach city whose market mixes Old Town beach homes, College Park single-family neighborhoods and Leisure World co-ops. Both are in Los Alamitos Unified. Over the three months ending September 2026, Rossmoor's median sale was $1,749,167; Seal Beach's citywide median was $469,277, but College Park East's was $1,629,543 and Old Town's $2,394,329.
Side by side
| Rossmoor | Seal Beach | |
|---|---|---|
| Government | County of Orange + Rossmoor Community Services District | City of Seal Beach (incorporated 1915) |
| ZIP code | 90720 (Los Alamitos mailing address) | 90740 |
| School district | Los Alamitos Unified | Los Alamitos Unified (almost all of the city) |
| Homes | 1950s single-family, many remodeled or rebuilt | Beach homes, suburban single-family, 55+ co-ops |
| Median sale | $1,749,167 | $469,277 citywide · $1,629,543 College Park East · $2,394,329 Old Town |
| Median days on market | 35 | 54 citywide |
Redfin, three months ending September 2026.
Which is right for you?
- Want to walk to the beach and Main Street? Look at Old Town and the Hill in Seal Beach.
- Want a larger lot on a quiet residential street? Compare Rossmoor with College Park East.
- 55 or older and want to downsize? Leisure World in Seal Beach is built for that.
- Want city services and a city council? Seal Beach is a city; Rossmoor is governed by the County.
Talk to Eunice about a home
Call or text (562) 714-1565, email hello@homesbyeunice.com, or start online.
Questions people ask
Is Rossmoor part of Seal Beach?
No. Rossmoor is unincorporated Orange County. The Shops at Rossmoor, though, is inside Seal Beach city limits.
Do Rossmoor and Seal Beach share schools?
Both are in the Los Alamitos Unified School District.
Is Rossmoor more expensive than Seal Beach?
Than Seal Beach's citywide median, yes, but that comparison mostly reflects Leisure World. Old Town Seal Beach's median ($2,394,329) was higher than Rossmoor's ($1,749,167) over the three months ending September 2026.
- Rossmoor, California (Wikipedia)
- Seal Beach, California (Wikipedia)
- Leisure World, Seal Beach (Wikipedia)
- Los Alamitos Unified School District: about the district
- Rossmoor housing market (Redfin)
- Seal Beach housing market (Redfin)
- College Park East housing market (Redfin)
- Old Town Seal Beach housing market (Redfin)