Licensing rules · California
Daycare ratios in California
In a California daycare center, one adult may care for up to 4 babies, 6 children at 18 months, 12 three- or four-year-olds and 14 children from age 5. California's rules in the national database cap group size only for toddlers, at 12 children at 18 and 35 months.
- Babies (6 weeks)
- 1:4
- Toddlers (18 months)
- 1:6
- 3-year-olds
- 1:12
- 4-year-olds
- 1:12
Daycare centers
Ratios and group sizes in California centers
The most children one adult may care for, and the largest group allowed in one room, at each age. From California's licensing rules as compiled in the 2025 national database.
| Child's age | Adults to children | Largest group |
|---|---|---|
| 6 weeks | 1:41 adult for 4 children | No limit in the rules |
| 11 months | 1:41 adult for 4 children | No limit in the rules |
| 18 months | 1:61 adult for 6 children | 12 children |
| 35 months | 1:61 adult for 6 children | 12 children |
| 3 years | 1:121 adult for 12 children | No limit in the rules |
| 4 years | 1:121 adult for 12 children | No limit in the rules |
| 5 years | 1:141 adult for 14 children | No limit in the rules |
| 6 years | 1:141 adult for 14 children | No limit in the rules |
| 7 years | 1:141 adult for 14 children | No limit in the rules |
| 8 to 9 years | 1:141 adult for 14 children | No limit in the rules |
| 10 years and older | 1:141 adult for 14 children | No limit in the rules |
The national database reads each state's rule at these sample ages; California's own rules give the exact age bands.
In the room
What the ratio means for your child
A ratio is the most children one adult may care for at once. At 1:6 for toddlers, a room of 12 children at 18 months, the most California allows in one toddler group, needs at least 2 adults; a preschool room of 12 four-year-olds may have just one.
The ratio is a minimum, not a promise of what you will see. Rooms are most likely to run at the limit early in the morning and late in the day, when fewer staff are in. For babies and preschoolers the rules set no group size limit, so ask how many children share your child's room and how many adults are with them.
The national database does not list a separate rule for mixed-age groups in California.
Home daycares
Rules for home daycares in California
In a California family child care home, one provider may have babies, toddlers and older children together, so ask how many babies are in the group and who steps in when the provider is busy with one child.
In a larger home with an assistant, ask whether the second adult is there for the whole day or only part of it, since the higher limit depends on two adults being present.
- As the national database records them
- Family child care home (one provider): up to 6 children (plus 2 school-age children).
- Group child care home (two or more providers): 6 children to 1 adult (plus 2 school-age children).
Enforcement
How California checks these rules
- Centers: California reported routine inspections once every three years, without notice.
- Family child care homes: routine inspections once every three years, without notice.
What California inspectors cite shows the rule areas cited most often.
Inspection schedules are from a 2017 national survey of state licensing agencies.
On the tour
Ask about ratios on a tour
- of the 4,214 California daycare websites we read post a staff-to-child ratio
- 6.9%
- How many adults are in my child's room, and how many children?
- How do staff keep track of every child during outdoor play, nap and pick-up?
- Who may pick up my child, and how do you check?
- Is the ratio the same at the start and end of the day, when fewer staff are in?
More questions: the daycare tour checklist.
Questions
Questions about daycare ratios in California
What is the infant ratio for daycare centers in California?
1:4. One adult may care for up to 4 babies. California's rules in the national database set no limit on how many babies may share one room.
What is the toddler ratio in California?
1:6 at 18 months and at 35 months, with groups of no more than 12 children.
What is the ratio for 4-year-olds in California daycares?
1:12. One adult may care for up to 12 four-year-olds, and the rules set no group size limit at this age.
How many children can a California home daycare have?
A family child care home with one provider may care for up to 6 children, plus 2 school-age children. A larger home with an assistant may care for up to 12, plus 2 school-age children.
How do I check whether a daycare keeps to the ratio?
Count the adults and children in the room on your tour, at drop-off and pick-up if you can. Only 6.9% of the 4,214 California daycare websites we read post a ratio, so ask the director directly.
Rules change. Before you rely on a number here, check California's current licensing rules or ask the state licensing agency.
Source: National Database of Child Care Licensing Regulations, Office of Child Care, Administration for Children and Families (licensingregulations.acf.hhs.gov), 2025 tables, retrieved October 7, 2026. Website figure: daycare websites read in 2026.