| Season Number: | 4 |
| Bgcolour: |
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| Num Episodes: | 20 |
| Network: | Freeform |
| Episode List: | List of The Fosters episodes |
| Prev Season: | Season 3 |
| Next Season: | Season 5 |
The fourth season of The Fosters premiered on June 20, 2016 and ended on April 11, 2017. The season consisted of 20 episodes and stars Teri Polo and Sherri Saum as Stef Foster and Lena Adams, an interracial lesbian couple, who foster a girl, Callie (Maia Mitchell) and her younger brother, Jude (Hayden Byerly) while also trying to juggle raising Latino twin teenagers, Mariana and Jesus (Cierra Ramirez and Noah Centineo), and Stef's biological son, Brandon (David Lambert).
In this season, the failout of the tryst between Brandon and Callie continues. After getting suspended from school Callie meets and makes a new friend in Aaron (Eliott Fletcher). They team up to find out what happened to an old foster brother of hers after being convicted of a murder 4 years earlier, and go down a dangerous path that's filled with unwanted surprises. Callie later gets charged with a hit run felony and spends time in juvie. Because of her age the DA is charging her as and adult and she may be sent to prison.
Lena's parents have financial issues and it threatens to force Stef and Lena to sell the house.
Jesus and Emma begin a strictly sexual relationship, and are considering getting back together. Jesus suffers from two BTI, first by a nail gun then later being assaulted. Jesus need full time care and Lena takes time off to care for him.
Jude starts spending more time with Noah (Kalama Epstein), an avid gay churchgoing Christian who has a wild side. Noah introduces Jude to drugs.
Mariana struggles to let go of Nick (Louis Hunter) after the incident at school. Mariana also struggles with the fact that Ana is now sober and is a caring mother to her baby sister.
Avoiding the rath of his mothers Brandon moves in with a single mom but finds parenthood a struggle. He goes to desperate measures in order to secure his place in Juilliard, which eventually backfires on him bigtime.
Stef gets promoted to detective and finds the role challenging. Meanwhile, offering to adopt AJ, Mike struggles with fatherhood while dealing with his girlfriend, Ana.
See main article: List of The Fosters characters.
See also: List of The Fosters episodes.