Montclair, CA vs Oak Park, CA
The cost of living difference between Montclair, CA and Oak Park, CA is dramatic. Montclair is 37.8% cheaper than Oak Park, a gap that translates to thousands of dollars per year in household expenses. Montclair has a cost index of 136 while Oak Park sits at 219, making this one of the more striking comparisons on our site. Relocating between these cities would require a serious reassessment of budget and lifestyle expectations.
On the housing front, median rent in Montclair is $1,759/month compared to $3,150/month in Oak Park — a 44% difference. Home values follow the same pattern: Montclair is more affordable at $549,600 median vs $1,017,100.
Median household income in Montclair is $76,338 compared to $160,484 in Oak Park (-52.4%). While Oak Park is more expensive, its higher salaries more than compensate — residents there may actually end up with more disposable income. Looking at affordability, residents of Montclair spend roughly 27.7% of their income on rent, more than the 23.6% in Oak Park.
Climate-wise, both cities share similar average temperatures (66.8°F vs 66.6°F). Oak Park receives more rainfall at 13.4" per year compared to 11.6" in Montclair.
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Housing
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Rent by Bedroom Size
HUD Fair Market Rent (FY 2026) — metro area average
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Climate
NOAA 30-year normals (1991-2020)