Ontario has no blanket overnight parking ban on ordinary passenger vehicles, but standard cars are still subject to the 72-hour limit (OMC Sec. 4-6.1011) and posted street-sweeping and time-restriction signs. Oversized vehicles and RVs may not be left on the street overnight without a 48-hour oversize-vehicle permit.
Unlike some cities, Ontario does not impose a citywide nightly curfew on parking ordinary registered passenger vehicles on residential streets; instead, overnight parking is controlled through the 72-hour rule, posted no-parking signs, permit-parking districts, and street-sweeping schedules. Under Sec. 4-6.1011 a passenger car may not stay in one spot for 72 or more consecutive hours, so a vehicle that sits overnight for several nights without moving can be cited and towed under California Vehicle Code 22651(k). Where residential blocks have preferential permit-parking zones, Sec. 4-6.1305 allows the City to restrict parking to permit holders during posted hours. Oversized vehicles and RVs are the key overnight exception: per the City's oversize-vehicle program (OMC Sec. 4-6.1020), they cannot be left on a public street overnight unless a temporary oversize permit is displayed, and that permit cannot exceed 48 hours. Drivers should always check posted signage for time-limited or street-sweeping restrictions that effectively bar overnight parking on a given block.
An ordinary vehicle left overnight is only in violation if it breaks the 72-hour rule, a posted time/permit restriction, or a street-sweeping no-parking window; those violations are citable and the 72-hour case is towable under CVC 22651(k). An RV or oversized vehicle left overnight without a displayed oversize permit is subject to citation and tow.
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Side-by-side rule comparisons with other cities in San Bernardino County.
See how other cities in San Bernardino County handle overnight parking.
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