Static relative permittivities, epsilon(r), were measured for 2-methyl-1-propanol, 2-methyl-1-butanol, 2-methyl-1-pentanol, and 2-methyl-1-hexanol under pressures up to 300 MPa at 298.15 K. Values of epsilon(r) increase with pressure for each 2-methyl-1-alkanol and are well-fitted with the Tait-type equation. In addition, a good correlation equation of static relative permittivities, epsilon(r)(P, n), for 2-methyl-1-alkanols with pressure P and the number n in H(CH2)(n-2)CH(CH3)CH2OH (n = 3 to 6) is given.