The 1986 Maryland Senate election were held on November 4, 1986, to elect senators in all 47 districts of the Maryland Senate. Members were elected in single-member constituencies to four-year terms. These elections were held concurrently with various federal and state elections, including for Governor of Maryland.

Following landslide victories for Paul Sarbanes and Harry Hughes in the 1982 elections, Republicans largely spent the following four years rebuilding the party. The party began its 1986 campaigns in a strong position with White House aide Linda Chavez leading the ticket, however, the party's status weakened as the election approached, with it shifting its focus away from legislative gains and toward limiting its legislative losses.

Summary Closest races Seats where the margin of victory was under 10%:

Retiring incumbents Democrats District 11: Melvin Steinberg retired to run for lieutenant governor of Maryland alongside William Donald Schaefer. District 14: James Clark Jr. retired. District 19: Sidney Kramer retired to run for Montgomery County Executive. District 20: Stewart W. Bainum Jr. retired to run for Congress in Maryland's 8th congressional district. District 25: B. W. Mike Donovan retired. District 38: Joseph J. Long Sr. retired. District 39: Clarence Mitchell III retired to run for Congress in Maryland's 7th congressional district.

Detailed results District 1 • District 2 • District 3 • District 4 • District 5 • District 6 • District 7 • District 8 • District 9 • District 10 • District 11 • District 12 • District 13 • District 14 • District 15 • District 16 • District 17 • District 18 • District 19 • District 20 • District 21 • District 22 • District 23 • District 24 • District 25 • District 26 • District 27 • District 28 • District 29 • District 30 • District 31 • District 32 • District 33 • District 34 • District 35 • District 36 • District 37 • District 38 • District 39 • District 40 • District 41 • District 42 • District 43 • District 44 • District 45 • District 46 • District 47__NOTOC__ All election results are from the Maryland State Board of Elections.

District 1

District 2

District 3

District 4

District 5

District 6

District 7

District 8

District 9

District 10

District 11

District 12

District 13

District 14

District 15

District 16

District 17

District 18

District 19

District 20

District 21

District 22

District 23

District 24

District 25

District 26

District 27

District 28

District 29

District 30

District 31

District 32

District 33

District 34

District 35

District 36

District 37

District 38

District 39

District 40

District 41

District 42

District 43

District 44

District 45

District 46

District 47

References