  We review the techniques and results of the searches for the Higgs boson
performed by the two Tevatron collaborations, CDF and DO. The Higgs boson
predicted by the Standard Model was sought in the mass range 90 GeV$<m_H<200$
GeV in all main production modes at the Tevatron: gluon-gluon fusion, $WH$ and
$ZH$ associated production, vector boson fusion, and $t\bar{t}H$ production,
and in five main decay modes: $H\rightarrow b{\bar{b}}$, $H\rightarrow
\tau^+\tau^-$, $H\rightarrow WW^{(*)}$, $H\rightarrow ZZ^{(*)}$, and
$H\rightarrow\gamma\gamma$. An excess of events was seen in the $H\rightarrow
b{\bar{b}}$ searches consistent with a Standard Model Higgs boson with a mass
in the range 115 GeV$<m_H<$135 GeV. Assuming a Higgs boson mass of $m_H=125$
GeV, studies of Higgs boson properties were performed, including measurements
of the product of the cross section times branching the ratio in various
production and decay modes, constraints on Higgs boson couplings to fermions
and vector bosons, and tests of spin and parity. We also summarize the results
of searches for supersymmetric Higgs bosons, and Higgs bosons in other
extensions of the Standard Model.
