Ostprignitz-Ruppin I is an electoral constituency (German: Wahlkreis) represented in the Landtag of Brandenburg. It elects one member via first-past-the-post voting. Under the constituency numbering system, it is designated as constituency 3. It is located in the Ostprignitz-Ruppin district^[2]

The constituency includes the towns of Neuruppin and Rheinsberg, as well as the community of Fehrbellin, and the administrative divisions of Lindow (Mark) and Temnitz.

There were 48,723 eligible voters in 2024.^[3]

State election (2024): Ostprignitz-Ruppin I[4]
Notes:		Blue background denotes the winner of the electorate vote. Pink background denotes a candidate elected from their party list. Yellow background denotes an electorate win by a list member, or other incumbent. A Y or N denotes status of any incumbent, win or lose respectively.
Party		Candidate		Votes	%	±%	Party votes	%	±%
	SPD	Ulrike Liedtke		11,663	34.6	11.0	10,503	31.0	2.8
	AfD	Henry Preuß		10,875	32.2	12.3	9,770	28.8	6.7
	BSW						4,551	13.4
	CDU	Redmann		5,609	16.6	3.1	4,320	12.7	4.0
	Left	Kretschmer		2,007	5.9	4.6	1,121	3.3	7.2
	BVB/FW	Kamrath		1,998	5.9	1.2	968	2.9	0.9
	Greens	Ahmed		726	2.2	14.4	1,293	3.8	8.2
	DLW	Straßberger		506	1.5		251	0.7
	APT						574	1.7	0.5
	Plus						223	0.7	0.3
	FDP	Pein		360	1.1	1.8	211	0.6	2.7
	Values						61	0.2
	Third Way						35	0.1
	DKP						19	0.1
Informal votes				443			287
Total valid votes				33,744			33,900
Turnout				34,187	70.2	14.2
	SPD hold		Majority	788	2.4	1.5

• Politics of Brandenburg
• Landtag of Brandenburg