St. Mary's Montessori School · Infant Center, Rancho Cucamonga
St. Mary's Montessori School is a licensed child care center in Rancho Cucamonga, CA, licensed for up to 28 children and serving infants and toddlers. It has held its California license since 2013. Since February 2021, state licensing staff have inspected it 5 times and investigated 1 complaint, 1 of them substantiated. The state issued 7 citations, 4 of them Type A (the most serious), most often for supervision (3 of 7). 2 citations came in the last 12 months, including 1 Type A. Measured by weighted citations per inspection, it is tied for #30 of 35 centers in Rancho Cucamonga and has more citations per inspection than 88% of California licensed centers.
Inspection record
Every state visit
What inspectors cited most
Citations, newest first
Based on interviews conducted and records reviewed, it was revealed C1 was served food that C1’s individual feeding plan indicated they were allergic to which poses a potential health and personal rights risk to children in care. 8 Director provided written confirmation that the plan was immediately implemented following the incident.
The facilty will update a written action plan/ and pictures for supervision and meeting child' needs to the department by
Based on record review, the licensee did not comply with the section cited above in which poses a potential health, safety or personal rights risk to persons in care. LPA observed the facility conducted the lead testing on 1/31/23 and 2/1/23. On 2/9/23 the lead testing report was provided. Licensee stated tere was not lead found.
Based on staff interviews a child was left on the playground, alone. This is an immediate risk to the health and safety of children in care. Civil penalty LIC421IM repeat violation for $1,000.00 issued today. 8 Teacher notified parent of the incident. Plan of correction cleared today.
Based on staff interviews, a child was left in a closet, alone. This is an immediate risk to the health and safety of children in care. Civil penalty LIC 421IM for $500.00 issued today. Under Appeal
Based on staff interviews and record review infants are comingling with preschool children. This is an immediate risk to the health, safety and personal rights of children in care.
Based on administration staff admitted to not reporting the incident to Community Care Licensing nor the child’s guardians This is a potential risk to the health and safety of children in care Director stated she will also have a training on reporting requirements and will send list of participants and topics to CCL by 3/15/23.
How common are lead-in-water citations in San Bernardino County? See the county-by-county report →
Complaint investigations
Child was left unattended in closet due to lack of supervision
Children are co-mingled
How often are complaints about daycares in San Bernardino County substantiated? See the county-by-county report →
About this center
Other licenses at this address
Common questions
Does St. Mary's Montessori School take infants?
Yes. It is licensed by California as an infant center.
Has St. Mary's Montessori School had any serious violations?
California issued 4 Type A citations since 2021, its most serious category. The most recent was on Jan 7, 2026, for care and supervision. Each citation is listed in full above.
Have there been complaints about St. Mary's Montessori School?
California investigated 1 complaint since 2021 and substantiated 1. Allegations are shown only for substantiated complaints.
How does St. Mary's Montessori School compare with other daycares in Rancho Cucamonga?
It is tied for #30 of 35 centers in Rancho Cucamonga by weighted citations per inspection, and has more citations per inspection than 88% of California licensed centers with enough inspection history to compare.
When was St. Mary's Montessori School last inspected?
Apr 15, 2026. No citations were issued during that visit.
How much does St. Mary's Montessori School cost?
California does not publish individual centers’ prices, so ask St. Mary's Montessori School for its current tuition. For comparison, the median full-time price at licensed centers in San Bernardino County, which includes Rancho Cucamonga, was $1,250 a month for infants (about $1,580 today) in the state’s 2021 Regional Market Rate Survey.
Who runs St. Mary's Montessori School?
The licensee is Himnel Usa Incorporated, and the administrator listed with the state is Deseree Jones.
Licensed centers nearby
6880 N Victoria Windrows Loop, Rancho Cucamonga · under 0.1 mi away · 209 spotsAmong the most citedKiddie Academy Of Rancho Cucamonga
7220 Victoria Park Lane, Rancho Cucamonga · 0.4 mi away · 24 spotsAmong the most citedKiddie Academy Of Rancho Cucamonga
7220 Victoria Park Lane, Rancho Cucamonga · 0.4 mi away · 28 spotsNo citationsKiddie Academy Of Rancho Cucamonga
7220 Victoria Park Lane, Rancho Cucamonga · 0.4 mi away · 127 spotsAmong the most citedSbcss Frost State Preschool
12860 Banyan Street, Rancho Cucamonga · 1.1 mi away · 24 spotsNo citationsKinderCare Learning Center
13523 Baseline Avenue, Fontana · 1.2 mi away · 42 spotsAbout typical
Citations are quoted from California Department of Social Services inspection and complaint reports. Type A citations are the state’s most serious category (an immediate risk to children’s health, safety or personal rights); Type B citations are a potential risk. A citation is a finding about one rule, not a judgment about a center overall. Complaint allegations appear here only when the state substantiated them.
To read the full state reports, search facility number 364842076 on the California Care Facility Search. Data refreshed Oct 3, 2026.
Comparing centers? See how to choose a daycare: 30 questions to ask and a printable checklist.