Runtuna has an electoral ward part of the Nyköping East constituency. The area covers a larger landmass than Runtuna's locality area, being adjacent to the Runtuna parish and the church that is about 4 kilometres (2.5 mi) northwest of the village. It has also been merged with the electoral district of Ludgo, growing larger during the 1973-2018 period.
| Year |
% |
Votes |
V |
S |
MP |
C |
L |
KD |
M |
SD |
ND |
Other |
|---|
| 1973[2] |
95.8 |
530 |
3.2 |
30.8 |
|
46.0 |
5.7 |
3.6 |
10.6 |
|
|
0.2 |
| 1976[3] |
96.5 |
544 |
1.3 |
32.7 |
|
46.1 |
6.1 |
2.4 |
11.2 |
|
|
0.2 |
| 1979[4] |
95.7 |
559 |
2.9 |
34.2 |
|
37.0 |
7.3 |
2.1 |
15.9 |
|
|
0.5 |
| 1982[5] |
95.0 |
591 |
1.4 |
37.1 |
1.7 |
34.2 |
4.1 |
3.2 |
18.4 |
|
|
0.0 |
| 1985[6] |
93.3 |
591 |
2.9 |
34.3 |
1.9 |
31.1 |
9.3 |
|
20.3 |
|
|
0.2 |
| 1988[7] |
91.8 |
598 |
4.2 |
30.8 |
5.7 |
26.4 |
8.4 |
4.0 |
20.2 |
|
|
0.3 |
| 1991[8] |
89.0 |
599 |
2.3 |
27.5 |
3.3 |
20.7 |
6.7 |
10.2 |
19.5 |
|
9.5 |
0.2 |
| 1994[9] |
90.0 |
595 |
5.0 |
36.5 |
6.4 |
20.2 |
3.9 |
5.2 |
20.8 |
|
0.3 |
1.7 |
| 1998[10] |
83.1 |
914 |
7.9 |
29.4 |
4.6 |
16.8 |
2.5 |
15.6 |
22.5 |
|
|
0.5 |
| 2002[11] |
84.7 |
901 |
5.3 |
33.3 |
5.9 |
19.1 |
8.2 |
13.0 |
13.5 |
1.1 |
|
0.5 |
| 2006[12] |
85.2 |
941 |
3.1 |
28.7 |
6.5 |
20.5 |
4.3 |
9.4 |
24.0 |
1.5 |
|
2.1 |
| 2010[13] |
87.1 |
988 |
3.4 |
26.2 |
8.2 |
13.7 |
5.5 |
6.6 |
29.5 |
5.1 |
|
1.9 |
| 2014[14] |
89.1 |
989 |
4.3 |
26.2 |
6.7 |
12.8 |
2.2 |
5.5 |
23.9 |
15.1 |
|
3.4 |
| 2018[15] |
88.9 |
1,001 |
6.1 |
25.6 |
4.3 |
14.0 |
2.4 |
7.4 |
19.4 |
19.5 |
|
1.4 |
